Jquery show only current parent childrens. Hide another families

Jquery show only current parent childrens. Hide another families - javascript

Have 3 level menu:
jQuery("#product_cats_nav li").toggle(
function () {
//var current = jQuery(this).closest('.level1');
//jQuery(current).siblings().addClass("hide");
jQuery(this).children().removeClass("hide").addClass("show");
},
function () {
jQuery(this).find("ul").removeClass("show").addClass("hide");
}
);
.hide {
display: none
};
.show {
display: block
};
#top_menu ul {
border: 1px solid red;
background-color: lime ;
position: absolute;
margin: 0;
width: 100%;
z-index: 100;
}
#top_menu li {
padding: 10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div class="col-full" id="top_menu">
<ul id="product_cats_nav">
<li class="level1" menu-level="1">Level1 A
<ul class="hide">
<li class="level2" menu-level="2">Level2 A
<ul class="hide">
<li class="level3" menu-level="3">
Level3 A</li>
</ul>
</li>
</ul>
</li>
<li class="level1" menu-level="1">Level1 B
<ul class="hide">
<li class="level2" menu-level="2">Level2 B
<ul class="hide">
<li class="level3" menu-level="3">
Level3 B</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
Goal:
When some submenu(level2) or (level1) is clicked and active (opened) close all another level1 childrens.
Current js just toogle one block with another, but not hide elements of another level1 children fammily
In snippet i had comment out my triyings with sibling..
How to solve that?

Is this what you are looking for?
jQuery("#product_cats_nav li").toggle(
function () {
//var current = jQuery(this).closest('.level1');
//jQuery(current).siblings().addClass("hide");
jQuery(this).closest('#product_cats_nav').find('ul').removeClass("show").addClass("hide");
jQuery(this).children().removeClass("hide").addClass("show");
},
function () {
jQuery(this).find("ul").removeClass("show").addClass("hide");
}
);
.hide {
display: none
};
.show {
display: block
};
#top_menu ul {
border: 1px solid red;
background-color: lime ;
position: absolute;
margin: 0;
width: 100%;
z-index: 100;
}
#top_menu li {
padding: 10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<div class="col-full" id="top_menu">
<ul id="product_cats_nav">
<li class="level1" menu-level="1">Level1 A
<ul class="hide">
<li class="level2" menu-level="2">Level2 A
<ul class="hide">
<li class="level3" menu-level="3">
Level3 A</li>
</ul>
</li>
</ul>
</li>
<li class="level1" menu-level="1">Level1 B
<ul class="hide">
<li class="level2" menu-level="2">Level2 B
<ul class="hide">
<li class="level3" menu-level="3">
Level3 B</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>

Related

Submenu dissappears on mouse hover

I want the dropdown menu behave like here: https://svyaznoy.ru
var timer;
$(".catalog-menu li").mouseenter(function() {
var that = this;
timer = setTimeout(function(){
$(that).children(".submenu").show();
}, 500);
}).mouseleave(function() {
var that = this;
clearTimeout(timer);
setTimeout(function () {
$(that).children(".submenu").hide();
}, 500);
});
ul {
list-style-type: none;
padding-left: 0;
}
ul.submenu {
display: none;
position: absolute;
left: 100%;
top: 1px;
margin-left: -1px;
}
li {
padding: 10px;
border: 1px solid #ddd;
margin-top: -1px;
}
li.submenu-item {
min-width: 110px;
}
ul.catalog-menu {
width: 150px;
position: relative;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.0/jquery.min.js"></script>
<ul class="catalog-menu">
<li>
<span>Apple</span>
<ul class="submenu">
<li class="submenu-item">
<span>Laptops</span>
<ul class="submenu">
<li class="submenu-item">Macbook 12</li>
<li class="submenu-item">Macbook Pro 13</li>
<li class="submenu-item">Macbook Pro 15</li>
<li class="submenu-item">Macbook Air Retina</li>
</ul>
</li>
<li class="submenu-item">
<span>iPhones</span>
<ul class="submenu">
<li class="submenu-item">iPhone 8</li>
<li class="submenu-item">iPhone 8 Plus</li>
<li class="submenu-item">iPhone X</li>
<li class="submenu-item">iPhone XS</li>
<li class="submenu-item">iPhone XS Max</li>
</ul>
</li>
</ul>
</li>
<li>Samsung</li>
<li>Xiaomi</li>
</ul>
It works somewhat similar to svyaznoy.ru, but have a bug.
For example, I hover on "Apple" menu item. Laptops and iPhones show up. Next I hover on "Laptops". Some apple laptop models show up. And here's where the bug shows: if my mouse pointer doesn't leave "Laptops" item and goes straight to laptops submenu - all is ok, but when it leaves "Laptops" on the way to laptops list, e.g. it hovers on iPhones for a moment, then laptops list hides, and I want it to stay there. How can I fix this bug?
jsfiddle: https://jsfiddle.net/16region/vtrj9wgk/30/

You can change display: none to visibility: hidden and add transition-delay. And so you wont need jquery/js
ul {
list-style-type: none;
padding-left: 0;
}
ul.submenu {
visibility: hidden;
position: absolute;
left: 100%;
top: 1px;
margin-left: -1px;
transition: 0s visibility;
transition-delay: 0.5s;
}
li {
padding: 10px;
border: 1px solid #ddd;
margin-top: -1px;
}
li:hover > ul.submenu {
visibility: visible;
}
li.submenu-item {
min-width: 110px;
}
ul.catalog-menu {
width: 150px;
position: relative;
}
<ul class="catalog-menu">
<li>
<span>Apple</span>
<ul class="submenu">
<li class="submenu-item">
<span>Laptops</span>
<ul class="submenu">
<li class="submenu-item">Macbook 12</li>
<li class="submenu-item">Macbook Pro 13</li>
<li class="submenu-item">Macbook Pro 15</li>
<li class="submenu-item">Macbook Air Retina</li>
</ul>
</li>
<li class="submenu-item">
<span>iPhones</span>
<ul class="submenu">
<li class="submenu-item">iPhone 8</li>
<li class="submenu-item">iPhone 8 Plus</li>
<li class="submenu-item">iPhone X</li>
<li class="submenu-item">iPhone XS</li>
<li class="submenu-item">iPhone XS Max</li>
</ul>
</li>
</ul>
</li>
<li>Samsung</li>
<li>Xiaomi</li>
</ul>

HTML collapse/expand tree not working as expected

I want to collapse category tree with multi hierarchy. I tried so many answers from stack, but it's not working. Can anyone please help me?
I tried this code : https://stackoverflow.com/a/30945775/7727479
Actual Result :
First display Test 1 and Test 3
Then, click on Test 1 => On click Test 2 and Test 8 should be display
Then, click on Test 2 => On click Test 4 and Test 7 should be display
and so on.
UPDATE :
Snippet :
$(document).ready(function() {
var getChild = $('ul.categories').children('li');
getChild.each(function(i, v) {
if ($(v).data('parentcategory') == "0") {
$(v).addClass('active-collapse');
}
});
$('div.categories-list li').click(function() {
var main_category = $(this).data('parentcategory');
$('ul.sub', $(this).parent()).eq(0).toggle();
});
});
div.categories-list {
width: 30%;
margin-bottom: 20px;
float: left;
}
ul.categories,
ul.sub {
border-top: 1px solid #c3cfd9;
margin: 0;
padding: 0;
}
ul.categories li {
margin: 0;
padding: 0;
list-style: none;
}
ul.categories li a {
display: block;
max-width: 100%;
padding: 10px 5px 10px 10px;
font-size: 13px;
background: #FCFCFC;
color: #3f729b;
border: 1px solid #c3cfd9;
border-top: 0px !important;
text-decoration: none;
font-weight: 700;
cursor: pointer;
transition: all 150ms ease-out;
-webkit-transition: all 150ms ease-out;
}
ul.categories li a:hover {
text-indent: 5px;
}
ul.sub {
display: none;
}
.activeUi {
display: block;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="categories-list">
<ul class="categories">
<li class="child active-collapse" data-parentcategory="0" data-id="1">
<a class="li-child-text" style="padding-left:1%">Test 1</a>
<ul class="sub" data-parentcategory="0" data-id="1">
<li class="child deactive-collapse" data-parentcategory="1" data-id="2">
<a class="li-child-text" style="padding-left:5%">Test 2</a>
<ul class="sub" data-parentcategory="1" data-id="2">
<li class="child deactive-collapse" data-parentcategory="2" data-id="4"><a class="li-child-text" style="padding-left:10%">Test 4</a></li>
<li class="single deactive-collapse" data-parentcategory="4" data-id="5"><a class="li-single-text" style="padding-left:20%">Test 5</a></li>
<li class="single deactive-collapse" data-parentcategory="4" data-id="6"><a class="li-single-text" style="padding-left:20%">Test 6</a></li>
</ul>
</li>
<li class="single deactive-collapse" data-parentcategory="2" data-id="7"><a class="li-single-text" style="padding-left:10%">Test 7</a></li>
</ul>
<ul class="sub" data-parentcategory="0" data-id="1">
<li class="child deactive-collapse" data-parentcategory="1" data-id="8"><a class="li-child-text" style="padding-left:5%">Test 8</a></li>
<li class="single deactive-collapse" data-parentcategory="8" data-id="9"><a class="li-single-text" style="padding-left:40%">Test 9</a></li>
</ul>
</li>
<li class="single active-collapse" data-parentcategory="0" data-id="3"><a class="li-single-text" style="padding-left:1%">Test 3</a></li>
</ul>
</div>

I think the main problem was in you html structure, if you want to create a level, you need to create li in that level with anchor in the li element.
For example to add TEST 2.2 in TEST 1.0 you need to find next ul.sub after the anchor that is for TEST 1.0 and add another li with anchor , and if you want to create another submenu in TEST2.2 you need to create ul with class sub and and another li
<li class="single deactive-collapse">
<a class="li-single-text" style="padding-left:5%">Test 2.2 LAST</a>
<ul class="sub" >
<li class="child deactive-collapse">
<a class="li-child-text" style="padding-left:10%">Test 3.2 LAST</a>
</li>
</ul>
</li>
And here is the snippet
var addById = function (parent, id, name) {
$('div.categories-list li').each(function (i, e) {
if (parent === $(e).data("id")) {
if (!$(e).find("ul.sub").length) {
$(e).append('<ul class="sub"></ul>');
}
element = '<li class="child deactive-collapse" data-parentcategory="' + parent + '" data-id="' + id + '"><a class="li-child-text" style="padding-left:5%">' + name + '</a></li>';
$(e).find("ul.sub").append($(element));
return true;
}
});
};
addById(1, 123, 'dynamically');
addById(15, 124, 'dynamically');
$(document).ready(function () {
$('div.categories-list li > a').click(function () {
var main_category = $(this).data('parentcategory');
$('ul.sub', $(this).parent()).eq(0).toggle();
return false;
});
});
div.categories-list {
width: 30%;
margin-bottom: 20px;
float: left;
}
ul.categories,
ul.sub {
border-top: 1px solid #c3cfd9;
margin: 0;
padding: 0;
}
ul.categories li {
margin: 0;
padding: 0;
list-style: none;
}
ul.categories li a {
display: block;
max-width: 100%;
padding: 10px 5px 10px 10px;
font-size: 13px;
background: #FCFCFC;
color: #3f729b;
border: 1px solid #c3cfd9;
border-top: 0px !important;
text-decoration: none;
font-weight: 700;
cursor: pointer;
transition: all 150ms ease-out;
-webkit-transition: all 150ms ease-out;
}
ul.categories li a:hover {
text-indent: 5px;
}
ul.sub {
display: none;
}
.activeUi {
display: block;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="categories-list">
<ul class="categories">
<li class="child active-collapse" data-parentcategory="0" data-id="1">
<a class="li-child-text" style="padding-left:1%">Test 1.0</a>
<ul class="sub">
<li class="child deactive-collapse" data-parentcategory="1" data-id="2">
<a class="li-child-text" style="padding-left:5%">Test 2.0</a>
<ul class="sub">
<li class="child deactive-collapse" data-parentcategory="2" data-id="4">
<a class="li-child-text" style="padding-left:10%">Test 3.0 LAST</a>
</li>
<li class="single deactive-collapse" data-parentcategory="2" data-id="5">
<a class="li-single-text" style="padding-left:10%">Test 3.0 LAST</a>
</li>
<li class="single deactive-collapse" data-parentcategory="2" data-id="6">
<a class="li-single-text" style="padding-left:10%">Test 3.0 LAST</a>
</li>
</ul>
</li>
<li class="single deactive-collapse" data-parentcategory="1" data-id="7">
<a class="li-single-text" style="padding-left:5%">Test 2.1 LAST</a>
</li>
<li class="child deactive-collapse" data-parentcategory="1" data-id="8">
<a class="li-child-text" style="padding-left:5%">Test 8</a>
<ul class="sub" data-parentcategory="8" data-id="9">
<li class="single deactive-collapse" data-parentcategory="8" data-id="9">
<a class="li-single-text" style="padding-left:40%">Test 9</a>
</li>
</ul>
</li>
<li class="single deactive-collapse" data-parentcategory="1" data-id="10">
<a class="li-single-text" style="padding-left:5%">Test 2.2 LAST</a>
<ul class="sub">
<li class="child deactive-collapse" data-parentcategory="10" data-id="11">
<a class="li-child-text" style="padding-left:10%">Test 3.2 LAST</a>
</li>
</ul>
</li>
<!-- PUT EXAMPLE CODE HERE -->
</ul>
</li>
<li class="child active-collapse" data-parentcategory="0" data-id="12">
<a class="li-child-text" style="padding-left:1%">Test 1.1</a>
<ul class="sub">
<li class="child deactive-collapse" data-parentcategory="12" data-id="13"><a class="li-child-text" style="padding-left:5%">Test 2.1 LAST</a></li>
<li class="single deactive-collapse" data-parentcategory="12" data-id="14"><a class="li-single-text" style="padding-left:5%">Test 2.1 LAST</a></li>
</ul>
</li>
<li class="single active-collapse" data-parentcategory="0" data-id="15"><a class="li-single-text" style="padding-left:1%">Test 1.2 LAST</a></li>
</ul>
</div>

Yes, you have some issues with the structure of ul li. Please have a look at my demo. You can add your classes and attributes to your will. It won't hamper.
document.querySelector('.categories').addEventListener('click', (e) => {
const el = e.target;
const sibling = el.nextSibling.nextSibling;
if (el && el.className == 'toggle' && sibling) {
sibling.classList.toggle('show');
}
});
div.categories-list {
width: 50%;
margin-bottom: 20px;
float: left;
}
ul.categories,
ul.sub {
border-top: 1px solid #c3cfd9;
margin: 0;
padding: 0;
}
ul.categories li {
margin: 0;
padding: 0;
list-style: none;
}
ul.categories li a {
display: block;
max-width: 100%;
padding: 10px 5px 10px 10px;
font-size: 13px;
background: #FCFCFC;
color: #3f729b;
border: 1px solid #c3cfd9;
border-top: 0px !important;
text-decoration: none;
font-weight: 700;
cursor: pointer;
transition: all 150ms ease-out;
-webkit-transition: all 150ms ease-out;
}
ul.categories li a:hover {
text-indent: 5px;
}
ul.sub {
display: none;
}
.activeUi {
display: block;
}
ul ul {
display: none;
}
.show {
display: block;
}
<div class="categories-list">
<ul class="categories">
<li >
Test 1
<ul>
<li>
Test 2
<ul>
<li>
Test 4
<ul>
<li>
Test 5
</li>
<li>
Test 6
</li>
</ul>
</li>
<li>
Test 7
</li>
</ul>
</li>
<li>
Test 8
<ul>
<li>
Test 9
</li>
</ul>
</li>
</ul>
</li>
<li>
Test 3
</li>
</ul>
</div>

menu acordeon : div stuck in my list because of the overflow

I want to create a side menu and my code look like this :
function opensubmenus() {
$('#submenus').css("display", "block");
}
#menus {
overflow-y: scroll;
width: 150px;
background-color: blue;
}
#submenus {
background-color: green;
display: none;
}
submenus ul {
float: right;
position: relative;
}
nav {
overflow: hidden;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav>
<div id='menus'>
<ul>
<li>
<span onclick='opensubmenus()'>Menu 1</span>
<ul id='submenus'>
<li>SubMenu 1
</li>
<li>
SubMenu 2
</li>
<li>
SubMenu 3
</li>
</ul>
</li>
<li>
Menu 2
</li>
<li>
Menu 3
</li>
</ul>
</div>
</nav>
But I when I show my submenu, he do not apear outside the box...
I want a menu like this :
I need absolutely need the "overflow-y" because I have a lot of menu and I need to have a scrolling option. Did you know how to have this result?

You have <ul id="submenus"> within <div id="menus">, if you don't want the sub menus inside of the menu, make another <div>, and put it in that:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav>
<div id='menus'>
<ul>
<li>
<span onclick='opensubmenus()'>Menu 1</span>
</li>
<li>
Menu 2
</li>
<li>
Menu 3
</li>
</ul>
</div>
<div>
<ul id='submenus'>
<li>SubMenu 1
</li>
<li>
SubMenu 2
</li>
<li>
SubMenu 3
</li>
</ul>
</div>
</nav>
Then to get them side-by-side, apply float:left; to #menus:
#menus {
overflow-y: scroll;
width: 150px;
background-color: blue;
float: left;
}
#submenus {
background-color: green;
display: none;
}
submenus, ul {
float: right;
position: relative;
}
nav {
overflow: hidden;
}

You can change your CSS and use absolute position on the submenu:
function opensubmenus() {
$('#submenus').css("display", "block");
}
#menus {
position:relative;
display:inline-block;
}
.main {
overflow-y: scroll;
margin:0;
width: 150px;
background-color: blue;
}
#submenus {
position:absolute;
left:100%;
top:0;
background-color: green;
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav>
<div id='menus'>
<ul class="main">
<li>
<span onclick='opensubmenus()'>Menu 1</span>
<ul id='submenus'>
<li>SubMenu 1
</li>
<li>
SubMenu 2
</li>
<li>
SubMenu 3
</li>
</ul>
</li>
<li>
Menu 2
</li>
<li>
Menu 3
</li>
</ul>
</div>
</nav>
Bonus -- Quick Multiple SubMenus
$('span').click(function(){
var col = $(this).data('color');
$('.submenus').hide();
$('span').css('background', '');
$(this).css('background', col);
$(this).next('.submenus').show().css('background', col);
})
#menus {
position:relative;
display:inline-block;
}
.main {
overflow-y: scroll;
margin:0;
width: 150px;
background-color: blue;
}
.submenus {
position:absolute;
left:100%;
top:0;
display: none;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<nav>
<div id='menus'>
<ul class="main">
<li>
<span data-color="red">Menu 1</span>
<ul class='submenus'>
<li>SubMenu 1
</li>
<li>
SubMenu 2
</li>
<li>
SubMenu 3
</li>
</ul>
</li>
<li>
<span data-color="yellow">Menu 2</span>
<ul class='submenus'>
<li>SubMenu 21
</li>
<li>
SubMenu 22
</li>
<li>
SubMenu 23
</li>
</ul>
</li>
<li>
<span data-color="green">Menu 3</span>
<ul class='submenus'>
<li>SubMenu 31
</li>
<li>
SubMenu 32
</li>
<li>
SubMenu 33
</li>
</ul>
</li>
</ul>
</div>
</nav>

How do I make my div's lined up?

I want my div's to line up on the top, but not line up at the bottom. This allows for flexibility of content:
/* font */
#import url(https://fonts.googleapis.com/css?family=Open+Sans);
/* end of font */
/* clear settings */
body {
padding: 0;
margin: 0;
background: white;
}
/* end of clear settings */
/* nav */
#nav {
width: 1600px;
height: 50px;
background: #009ACD;
}
/* end of nav */
/* info nav */
#primary_nav_wrap
{
width: 1600px;
height: 50px;
background: #1F1F1F;
}
#primary_nav_wrap ul
{
list-style:none;
position:relative;
float:left;
margin:0;
padding:0;
left: 3%;
top: 5px;
}
#primary_nav_wrap ul a
{
display:block;
text-decoration:none;
font-size:15px;
padding: 10px 15px 10px 15px;
font-family: 'Open Sans', sans-serif;
color: white;
}
#primary_nav_wrap ul a:hover {
background: white;
}
#primary_nav_wrap ul li
{
position:relative;
float:left;
margin:0;
padding:0;
}
#primary_nav_wrap ul li:hover a {
color: black;
background: white;
}
#primary_nav_wrap ul li a:hover {
background: white;
}
#primary_nav_wrap ul ul li a:hover {
background: #F4F4F4;
}
#primary_nav_wrap ul ul
{
display:none;
position:absolute;
top:100%;
left:0;
background:#fff;
padding:0;
margin-top: 0.2px;
border: 1px solid #ccc;
border-top: none;
z-index: 50;
}
#primary_nav_wrap ul ul li
{
float:none;
width:200px;
position: relative;
left: 0px;
}
#primary_nav_wrap ul ul a
{
line-height:120%;
padding:7.5px 9px;
}
#primary_nav_wrap ul ul ul
{
top:0;
left:100%
}
#primary_nav_wrap ul li:hover > ul
{
display:block
}
/* end of info nav */
/* course div */
#course_div {
width: 1200px;
position: relative;
left: 180px;
top: 30px;
padding: 10px;
}
#course_img {
width: 216px;
height: 121.5px;
border: 1px solid #ccc;
border-bottom: none;
}
#course_info {
border: 1px solid #ccc;
width: 205.5px;
padding: 5px;
position: relative;
top: -4px;
font-family: 'Open Sans', sans-serif;
font-size: 16px;
}
a .course_main {
text-decoration: none;
color: black;
width: 204px;
}
.course_main {
width: 216px;
display: inline-block;
margin-right: 30px;
-webkit-touch-callout: none; /* iOS Safari */
-webkit-user-select: none; /* Chrome/Safari/Opera */
-khtml-user-select: none; /* Konqueror */
-moz-user-select: none; /* Firefox */
-ms-user-select: none; /* Internet Explorer/Edge */
user-select: none; /* Non-prefixed version, currently
not supported by any browser */
}
/* end of course div */
<!DOCTYPE html>
<html>
<head>
<title> Hacked Genius </title>
<link rel='stylesheet' href='main.css'>
<script src='main.js'></script>
</head>
<body>
<!-- nav -->
<div id='nav'>
</div>
<!-- end of nav -->
<!-- info nav -->
<nav id="primary_nav_wrap">
<ul>
<li>Development
<ul>
<li>Web Development</li>
<li>Mobile Apps</li>
<li>Programming Languages</li>
<li>Game Development</li>
<li>Databases</li>
<li>Software Testing</li>
<li>Software Engineering</li>
<li>Development Tools</li>
<li>E-Commerce</li>
</ul>
</li>
<li>Business
<ul>
<li>Finance</li>
<li>Entrepreneurship</li>
<li>Communications</li>
<li>Management</li>
<li>Sales</li>
<li>Strategy</li>
<li>Operations</li>
<li>Project Management</li>
<li>Business Law</li>
<li>Data and Anylytics</li>
<li>Home Business</li>
<li>Human Resources</li>
<li>Industry</li>
<li>Media</li>
<li>Real Estate</li>
<li>Other</li>
</ul>
</li>
<li>IT & Software
<ul>
<li class="dir">IT Certification</li>
<li class="dir">Network & Security
<li>Hardware</li>
<li>Operating Systems</li>
<li>Other</li>
</ul>
<li>Office Productivity
<ul>
<li class="dir">Microsoft</li>
<li class="dir">Apple
<li>Google</li>
<li>SAP</li>
<li>Intuit</li>
<li>Salesforce</li>
<li>Oracle</li>
<li>Other</li>
</ul>
<li>Personal Development
<ul>
<li class="dir">Personal Transformation</li>
<li class="dir">Productivity
<li>Leadership</li>
<li>Personal Finance</li>
<li>Career Development</li>
<li>Parenting & Relationships</li>
<li>Happiness</li>
<li>Religion & Spirituality</li>
<li>Personal Brand Building</li>
<li>Creativity</li>
<li>Influence</li>
<li>Self Esteem</li>
<li>Stress Management</li>
<li>Memory and Study Skills</li>
<li>Motivation</li>
<li>Other</li>
</ul>
<li>Design
<ul>
<li class="dir">Web Design</li>
<li class="dir">Graphic Design
<li>Design Tools</li>
<li>User Experience</li>
<li>Game Design</li>
<li>Design Thinking</li>
<li>3D & Animation</li>
<li>Fashion</li>
<li>Architectural Design</li>
<li>Interior Design</li>
<li>Other</li>
</ul>
<li>Marketing
<ul>
<li class="dir">Digital Marketing</li>
<li class="dir">Search Engine Optimization
<li>Social Media Marketing</li>
<li>Branding</li>
<li>Marketing Fundamentals</li>
<li>Analystics & Automation</li>
<li>Public Relations</li>
<li>Advertising</li>
<li>Video & Mobile Marketing</li>
<li>Content Marketing</li>
<li>Non-Digital Marketing</li>
<li>Growth Hacking</li>
<li>Affiliate Marketing</li>
<li>Product Marketing</li>
<li>Other</li>
</ul>
<li>Lifestyle
<ul>
<li class="dir">Life Hacks</li>
<li class="dir">Arts & Crafts</li>
<li class="dir">Food & Beverage
<li>Beauty & Makeup</li>
<li>Travel</li>
<li>Gaming</li>
<li>Home Improvement</li>
<li>Pet Care & Training</li>
</ul>
<li>Photography
<ul>
<li class="dir">Digital Photography</li>
<li class="dir">Photography Fundamentals</li>
<li class="dir">Portraits
<li>Landscape</li>
<li>Black & White</li>
<li>Photography Tools</li>
<li>Mobile Photography</li>
<li>Travel Photography</li>
<li>Commercial Photography</li>
<li>Wedding Photography</li>
<li>Video Design</li>
<li>Other</li>
</ul>
<li>Health & Fitness
<ul>
<li class="dir">Fitness</li>
<li class="dir">General Health</li>
<li class="dir">Sports
<li>Nutrition</li>
<li>Yoga</li>
<li>Mental Health</li>
<li>Dieting</li>
<li>Self Defense</li>
<li>Safety & First Aid</li>
<li>Dance</li>
<li>Meditation</li>
<li>Other</li>
</ul>
<li>Language
<ul>
<li class="dir">English</li>
<li class="dir">Spanish</li>
<li class="dir">German
<li>French</li>
<li>Japanese</li>
<li>Portuguese</li>
<li>Chinese</li>
<li>Russian</li>
<li>Latin</li>
<li>Arabic</li>
<li>Hebrew</li>
<li>Italian</li>
<li>Other</li>
</ul>
<li>Music
<ul>
<li class="dir">Instruments</li>
<li class="dir">Production</li>
<li class="dir">Music Fundamentals
<li>Vocal</li>
<li>Music Techniques</li>
<li>Music Software</li>
<li>Other</li>
</ul>
<li>Academics
<ul>
<li class="dir">Social Science</li>
<li class="dir">Math & Science</li>
<li class="dir">Humanities
</ul>
</ul>
</nav>
<!-- end of info nav -->
<div id='course_div'>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Excel Excel Excel Excel Excel Excel
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
</div>
</body>
</html>
In the above example, I have two divs, but they are not lined up. How do I line up the divs on the top? I've tried the flex property, but nothing is working...

display flex, does the job.
See the code below with your updated display propery.
/* font */
#import url(https://fonts.googleapis.com/css?family=Open+Sans);
/* end of font */
/* clear settings */
body {
padding: 0;
margin: 0;
background: white;
}
/* end of clear settings */
/* nav */
#nav {
width: 1600px;
height: 50px;
background: #009ACD;
}
/* end of nav */
/* info nav */
#primary_nav_wrap {
width: 1600px;
height: 50px;
background: #1F1F1F;
}
#primary_nav_wrap ul {
list-style: none;
position: relative;
float: left;
margin: 0;
padding: 0;
left: 3%;
top: 5px;
}
#primary_nav_wrap ul a {
display: block;
text-decoration: none;
font-size: 15px;
padding: 10px 15px 10px 15px;
font-family: 'Open Sans', sans-serif;
color: white;
}
#primary_nav_wrap ul a:hover {
background: white;
}
#primary_nav_wrap ul li {
position: relative;
float: left;
margin: 0;
padding: 0;
}
#primary_nav_wrap ul li:hover a {
color: black;
background: white;
}
#primary_nav_wrap ul li a:hover {
background: white;
}
#primary_nav_wrap ul ul li a:hover {
background: #F4F4F4;
}
#primary_nav_wrap ul ul {
display: none;
position: absolute;
top: 100%;
left: 0;
background: #fff;
padding: 0;
margin-top: 0.2px;
border: 1px solid #ccc;
border-top: none;
z-index: 50;
}
#primary_nav_wrap ul ul li {
float: none;
width: 200px;
position: relative;
left: 0px;
}
#primary_nav_wrap ul ul a {
line-height: 120%;
padding: 7.5px 9px;
}
#primary_nav_wrap ul ul ul {
top: 0;
left: 100%
}
#primary_nav_wrap ul li:hover > ul {
display: block
}
/* end of info nav */
/* course div */
#course_div {
width: 1200px;
position: relative;
left: 180px;
top: 30px;
padding: 10px;
display: flex; /* ADD YOUR FLEX DISPLAY PROPERTY HERE */
flex-flow: wrap;
}
#course_img {
width: 216px;
height: 121.5px;
border: 1px solid #ccc;
border-bottom: none;
}
#course_info {
border: 1px solid #ccc;
width: 205.5px;
padding: 5px;
position: relative;
top: -4px;
font-family: 'Open Sans', sans-serif;
font-size: 16px;
}
a .course_main {
text-decoration: none;
color: black;
width: 204px;
}
.course_main {
width: 216px;
display: inline-block;
margin-right: 30px;
-webkit-touch-callout: none;
/* iOS Safari */
-webkit-user-select: none;
/* Chrome/Safari/Opera */
-khtml-user-select: none;
/* Konqueror */
-moz-user-select: none;
/* Firefox */
-ms-user-select: none;
/* Internet Explorer/Edge */
user-select: none;
/* Non-prefixed version, currently
not supported by any browser */
}
/* end of course div */
<!DOCTYPE html>
<html>
<head>
<title>Hacked Genius</title>
<link rel='stylesheet' href='main.css'>
<script src='main.js'></script>
</head>
<body>
<!-- nav -->
<div id='nav'>
</div>
<!-- end of nav -->
<!-- info nav -->
<nav id="primary_nav_wrap">
<ul>
<li>Development
<ul>
<li>Web Development
</li>
<li>Mobile Apps
</li>
<li>Programming Languages
</li>
<li>Game Development
</li>
<li>Databases
</li>
<li>Software Testing
</li>
<li>Software Engineering
</li>
<li>Development Tools
</li>
<li>E-Commerce
</li>
</ul>
</li>
<li>Business
<ul>
<li>Finance
</li>
<li>Entrepreneurship
</li>
<li>Communications
</li>
<li>Management
</li>
<li>Sales
</li>
<li>Strategy
</li>
<li>Operations
</li>
<li>Project Management
</li>
<li>Business Law
</li>
<li>Data and Anylytics
</li>
<li>Home Business
</li>
<li>Human Resources
</li>
<li>Industry
</li>
<li>Media
</li>
<li>Real Estate
</li>
<li>Other
</li>
</ul>
</li>
<li>IT & Software
<ul>
<li class="dir">IT Certification
</li>
<li class="dir">Network & Security
<li>Hardware
</li>
<li>Operating Systems
</li>
<li>Other
</li>
</ul>
<li>Office Productivity
<ul>
<li class="dir">Microsoft
</li>
<li class="dir">Apple
<li>Google
</li>
<li>SAP
</li>
<li>Intuit
</li>
<li>Salesforce
</li>
<li>Oracle
</li>
<li>Other
</li>
</ul>
<li>Personal Development
<ul>
<li class="dir">Personal Transformation
</li>
<li class="dir">Productivity
<li>Leadership
</li>
<li>Personal Finance
</li>
<li>Career Development
</li>
<li>Parenting & Relationships
</li>
<li>Happiness
</li>
<li>Religion & Spirituality
</li>
<li>Personal Brand Building
</li>
<li>Creativity
</li>
<li>Influence
</li>
<li>Self Esteem
</li>
<li>Stress Management
</li>
<li>Memory and Study Skills
</li>
<li>Motivation
</li>
<li>Other
</li>
</ul>
<li>Design
<ul>
<li class="dir">Web Design
</li>
<li class="dir">Graphic Design
<li>Design Tools
</li>
<li>User Experience
</li>
<li>Game Design
</li>
<li>Design Thinking
</li>
<li>3D & Animation
</li>
<li>Fashion
</li>
<li>Architectural Design
</li>
<li>Interior Design
</li>
<li>Other
</li>
</ul>
<li>Marketing
<ul>
<li class="dir">Digital Marketing
</li>
<li class="dir">Search Engine Optimization
<li>Social Media Marketing
</li>
<li>Branding
</li>
<li>Marketing Fundamentals
</li>
<li>Analystics & Automation
</li>
<li>Public Relations
</li>
<li>Advertising
</li>
<li>Video & Mobile Marketing
</li>
<li>Content Marketing
</li>
<li>Non-Digital Marketing
</li>
<li>Growth Hacking
</li>
<li>Affiliate Marketing
</li>
<li>Product Marketing
</li>
<li>Other
</li>
</ul>
<li>Lifestyle
<ul>
<li class="dir">Life Hacks
</li>
<li class="dir">Arts & Crafts
</li>
<li class="dir">Food & Beverage
<li>Beauty & Makeup
</li>
<li>Travel
</li>
<li>Gaming
</li>
<li>Home Improvement
</li>
<li>Pet Care & Training
</li>
</ul>
<li>Photography
<ul>
<li class="dir">Digital Photography
</li>
<li class="dir">Photography Fundamentals
</li>
<li class="dir">Portraits
<li>Landscape
</li>
<li>Black & White
</li>
<li>Photography Tools
</li>
<li>Mobile Photography
</li>
<li>Travel Photography
</li>
<li>Commercial Photography
</li>
<li>Wedding Photography
</li>
<li>Video Design
</li>
<li>Other
</li>
</ul>
<li>Health & Fitness
<ul>
<li class="dir">Fitness
</li>
<li class="dir">General Health
</li>
<li class="dir">Sports
<li>Nutrition
</li>
<li>Yoga
</li>
<li>Mental Health
</li>
<li>Dieting
</li>
<li>Self Defense
</li>
<li>Safety & First Aid
</li>
<li>Dance
</li>
<li>Meditation
</li>
<li>Other
</li>
</ul>
<li>Language
<ul>
<li class="dir">English
</li>
<li class="dir">Spanish
</li>
<li class="dir">German
<li>French
</li>
<li>Japanese
</li>
<li>Portuguese
</li>
<li>Chinese
</li>
<li>Russian
</li>
<li>Latin
</li>
<li>Arabic
</li>
<li>Hebrew
</li>
<li>Italian
</li>
<li>Other
</li>
</ul>
<li>Music
<ul>
<li class="dir">Instruments
</li>
<li class="dir">Production
</li>
<li class="dir">Music Fundamentals
<li>Vocal
</li>
<li>Music Techniques
</li>
<li>Music Software
</li>
<li>Other
</li>
</ul>
<li>Academics
<ul>
<li class="dir">Social Science
</li>
<li class="dir">Math & Science
</li>
<li class="dir">Humanities
</ul>
</ul>
</nav>
<!-- end of info nav -->
<div id='course_div'>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Excel Excel Excel Excel Excel Excel
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
</div>
</body>
</html>

Another option is to add float: left; to the anchor tags in #course_div and then target every anchor element after the 5th anchor element with nth-child() to clear the floated elements before it.
#course_div a {
float: left;
}
#course_div a:nth-child(5n+6) {
clear: left;
}
SIDE NOTE: #course_info is being used repeatedly and should be a CSS class, .course_info.
/* font */
#import url(https://fonts.googleapis.com/css?family=Open+Sans);
/* end of font */
/* clear settings */
body {
padding: 0;
margin: 0;
background: white;
}
/* end of clear settings */
/* nav */
#nav {
width: 1600px;
height: 50px;
background: #009ACD;
}
/* end of nav */
/* info nav */
#primary_nav_wrap
{
width: 1600px;
height: 50px;
background: #1F1F1F;
}
#primary_nav_wrap ul
{
list-style:none;
position:relative;
float:left;
margin:0;
padding:0;
left: 3%;
top: 5px;
}
#primary_nav_wrap ul a
{
display:block;
text-decoration:none;
font-size:15px;
padding: 10px 15px 10px 15px;
font-family: 'Open Sans', sans-serif;
color: white;
}
#primary_nav_wrap ul a:hover {
background: white;
}
#primary_nav_wrap ul li
{
position:relative;
float:left;
margin:0;
padding:0;
}
#primary_nav_wrap ul li:hover a {
color: black;
background: white;
}
#primary_nav_wrap ul li a:hover {
background: white;
}
#primary_nav_wrap ul ul li a:hover {
background: #F4F4F4;
}
#primary_nav_wrap ul ul
{
display:none;
position:absolute;
top:100%;
left:0;
background:#fff;
padding:0;
margin-top: 0.2px;
border: 1px solid #ccc;
border-top: none;
z-index: 50;
}
#primary_nav_wrap ul ul li
{
float:none;
width:200px;
position: relative;
left: 0px;
}
#primary_nav_wrap ul ul a
{
line-height:120%;
padding:7.5px 9px;
}
#primary_nav_wrap ul ul ul
{
top:0;
left:100%
}
#primary_nav_wrap ul li:hover > ul
{
display:block
}
/* end of info nav */
/* course div */
#course_div {
width: 1200px;
position: relative;
left: 180px;
top: 30px;
padding: 10px;
}
#course_img {
width: 216px;
height: 121.5px;
border: 1px solid #ccc;
border-bottom: none;
}
#course_info {
border: 1px solid #ccc;
width: 205.5px;
padding: 5px;
position: relative;
top: -4px;
font-family: 'Open Sans', sans-serif;
font-size: 16px;
}
a .course_main {
text-decoration: none;
color: black;
width: 204px;
}
.course_main {
width: 216px;
display: inline-block;
margin-right: 30px;
-webkit-touch-callout: none; /* iOS Safari */
-webkit-user-select: none; /* Chrome/Safari/Opera */
-khtml-user-select: none; /* Konqueror */
-moz-user-select: none; /* Firefox */
-ms-user-select: none; /* Internet Explorer/Edge */
user-select: none; /* Non-prefixed version, currently
not supported by any browser */
}
#course_div a {
float: left;
}
#course_div a:nth-child(5n+6) {
clear: left;
}
/* end of course div */
<!DOCTYPE html>
<html>
<head>
<title> Hacked Genius </title>
<link rel='stylesheet' href='main.css'>
<script src='main.js'></script>
</head>
<body>
<!-- nav -->
<div id='nav'>
</div>
<!-- end of nav -->
<!-- info nav -->
<nav id="primary_nav_wrap">
<ul>
<li>Development
<ul>
<li>Web Development</li>
<li>Mobile Apps</li>
<li>Programming Languages</li>
<li>Game Development</li>
<li>Databases</li>
<li>Software Testing</li>
<li>Software Engineering</li>
<li>Development Tools</li>
<li>E-Commerce</li>
</ul>
</li>
<li>Business
<ul>
<li>Finance</li>
<li>Entrepreneurship</li>
<li>Communications</li>
<li>Management</li>
<li>Sales</li>
<li>Strategy</li>
<li>Operations</li>
<li>Project Management</li>
<li>Business Law</li>
<li>Data and Anylytics</li>
<li>Home Business</li>
<li>Human Resources</li>
<li>Industry</li>
<li>Media</li>
<li>Real Estate</li>
<li>Other</li>
</ul>
</li>
<li>IT & Software
<ul>
<li class="dir">IT Certification</li>
<li class="dir">Network & Security
<li>Hardware</li>
<li>Operating Systems</li>
<li>Other</li>
</ul>
<li>Office Productivity
<ul>
<li class="dir">Microsoft</li>
<li class="dir">Apple
<li>Google</li>
<li>SAP</li>
<li>Intuit</li>
<li>Salesforce</li>
<li>Oracle</li>
<li>Other</li>
</ul>
<li>Personal Development
<ul>
<li class="dir">Personal Transformation</li>
<li class="dir">Productivity
<li>Leadership</li>
<li>Personal Finance</li>
<li>Career Development</li>
<li>Parenting & Relationships</li>
<li>Happiness</li>
<li>Religion & Spirituality</li>
<li>Personal Brand Building</li>
<li>Creativity</li>
<li>Influence</li>
<li>Self Esteem</li>
<li>Stress Management</li>
<li>Memory and Study Skills</li>
<li>Motivation</li>
<li>Other</li>
</ul>
<li>Design
<ul>
<li class="dir">Web Design</li>
<li class="dir">Graphic Design
<li>Design Tools</li>
<li>User Experience</li>
<li>Game Design</li>
<li>Design Thinking</li>
<li>3D & Animation</li>
<li>Fashion</li>
<li>Architectural Design</li>
<li>Interior Design</li>
<li>Other</li>
</ul>
<li>Marketing
<ul>
<li class="dir">Digital Marketing</li>
<li class="dir">Search Engine Optimization
<li>Social Media Marketing</li>
<li>Branding</li>
<li>Marketing Fundamentals</li>
<li>Analystics & Automation</li>
<li>Public Relations</li>
<li>Advertising</li>
<li>Video & Mobile Marketing</li>
<li>Content Marketing</li>
<li>Non-Digital Marketing</li>
<li>Growth Hacking</li>
<li>Affiliate Marketing</li>
<li>Product Marketing</li>
<li>Other</li>
</ul>
<li>Lifestyle
<ul>
<li class="dir">Life Hacks</li>
<li class="dir">Arts & Crafts</li>
<li class="dir">Food & Beverage
<li>Beauty & Makeup</li>
<li>Travel</li>
<li>Gaming</li>
<li>Home Improvement</li>
<li>Pet Care & Training</li>
</ul>
<li>Photography
<ul>
<li class="dir">Digital Photography</li>
<li class="dir">Photography Fundamentals</li>
<li class="dir">Portraits
<li>Landscape</li>
<li>Black & White</li>
<li>Photography Tools</li>
<li>Mobile Photography</li>
<li>Travel Photography</li>
<li>Commercial Photography</li>
<li>Wedding Photography</li>
<li>Video Design</li>
<li>Other</li>
</ul>
<li>Health & Fitness
<ul>
<li class="dir">Fitness</li>
<li class="dir">General Health</li>
<li class="dir">Sports
<li>Nutrition</li>
<li>Yoga</li>
<li>Mental Health</li>
<li>Dieting</li>
<li>Self Defense</li>
<li>Safety & First Aid</li>
<li>Dance</li>
<li>Meditation</li>
<li>Other</li>
</ul>
<li>Language
<ul>
<li class="dir">English</li>
<li class="dir">Spanish</li>
<li class="dir">German
<li>French</li>
<li>Japanese</li>
<li>Portuguese</li>
<li>Chinese</li>
<li>Russian</li>
<li>Latin</li>
<li>Arabic</li>
<li>Hebrew</li>
<li>Italian</li>
<li>Other</li>
</ul>
<li>Music
<ul>
<li class="dir">Instruments</li>
<li class="dir">Production</li>
<li class="dir">Music Fundamentals
<li>Vocal</li>
<li>Music Techniques</li>
<li>Music Software</li>
<li>Other</li>
</ul>
<li>Academics
<ul>
<li class="dir">Social Science</li>
<li class="dir">Math & Science</li>
<li class="dir">Humanities
</ul>
</ul>
</nav>
<!-- end of info nav -->
<div id='course_div'>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Excel Excel Excel Excel Excel Excel
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Excel Excel Excel Excel Excel Excel
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
<a href='#'> <div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div> </div></a>
</div>
</body>
</html>

Add vertical-align:top; to your .course_main class:
/* font */
#import url(https://fonts.googleapis.com/css?family=Open+Sans);
/* end of font */
/* clear settings */
body {
padding: 0;
margin: 0;
background: white;
}
/* end of clear settings */
/* nav */
#nav {
width: 1600px;
height: 50px;
background: #009ACD;
}
/* end of nav */
/* info nav */
#primary_nav_wrap {
width: 1600px;
height: 50px;
background: #1F1F1F;
}
#primary_nav_wrap ul {
list-style: none;
position: relative;
float: left;
margin: 0;
padding: 0;
left: 3%;
top: 5px;
}
#primary_nav_wrap ul a {
display: block;
text-decoration: none;
font-size: 15px;
padding: 10px 15px 10px 15px;
font-family: 'Open Sans', sans-serif;
color: white;
}
#primary_nav_wrap ul a:hover {
background: white;
}
#primary_nav_wrap ul li {
position: relative;
float: left;
margin: 0;
padding: 0;
}
#primary_nav_wrap ul li:hover a {
color: black;
background: white;
}
#primary_nav_wrap ul li a:hover {
background: white;
}
#primary_nav_wrap ul ul li a:hover {
background: #F4F4F4;
}
#primary_nav_wrap ul ul {
display: none;
position: absolute;
top: 100%;
left: 0;
background: #fff;
padding: 0;
margin-top: 0.2px;
border: 1px solid #ccc;
border-top: none;
z-index: 50;
}
#primary_nav_wrap ul ul li {
float: none;
width: 200px;
position: relative;
left: 0px;
}
#primary_nav_wrap ul ul a {
line-height: 120%;
padding: 7.5px 9px;
}
#primary_nav_wrap ul ul ul {
top: 0;
left: 100%
}
#primary_nav_wrap ul li:hover > ul {
display: block
}
/* end of info nav */
/* course div */
#course_div {
width: 1200px;
position: relative;
left: 180px;
top: 30px;
padding: 10px;
}
#course_img {
width: 216px;
height: 121.5px;
border: 1px solid #ccc;
border-bottom: none;
}
#course_info {
border: 1px solid #ccc;
width: 205.5px;
padding: 5px;
position: relative;
top: -4px;
font-family: 'Open Sans', sans-serif;
font-size: 16px;
}
a .course_main {
text-decoration: none;
color: black;
width: 204px;
}
.course_main {
vertical-align:top;
width: 216px;
display: inline-block;
margin-right: 30px;
-webkit-touch-callout: none;
/* iOS Safari */
-webkit-user-select: none;
/* Chrome/Safari/Opera */
-khtml-user-select: none;
/* Konqueror */
-moz-user-select: none;
/* Firefox */
-ms-user-select: none;
/* Internet Explorer/Edge */
user-select: none;
/* Non-prefixed version, currently
not supported by any browser */
}
/* end of course div */
<!DOCTYPE html>
<html>
<head>
<title>Hacked Genius</title>
<link rel='stylesheet' href='main.css'>
<script src='main.js'></script>
</head>
<body>
<!-- nav -->
<div id='nav'>
</div>
<!-- end of nav -->
<!-- info nav -->
<nav id="primary_nav_wrap">
<ul>
<li>Development
<ul>
<li>Web Development
</li>
<li>Mobile Apps
</li>
<li>Programming Languages
</li>
<li>Game Development
</li>
<li>Databases
</li>
<li>Software Testing
</li>
<li>Software Engineering
</li>
<li>Development Tools
</li>
<li>E-Commerce
</li>
</ul>
</li>
<li>Business
<ul>
<li>Finance
</li>
<li>Entrepreneurship
</li>
<li>Communications
</li>
<li>Management
</li>
<li>Sales
</li>
<li>Strategy
</li>
<li>Operations
</li>
<li>Project Management
</li>
<li>Business Law
</li>
<li>Data and Anylytics
</li>
<li>Home Business
</li>
<li>Human Resources
</li>
<li>Industry
</li>
<li>Media
</li>
<li>Real Estate
</li>
<li>Other
</li>
</ul>
</li>
<li>IT & Software
<ul>
<li class="dir">IT Certification
</li>
<li class="dir">Network & Security
<li>Hardware
</li>
<li>Operating Systems
</li>
<li>Other
</li>
</ul>
<li>Office Productivity
<ul>
<li class="dir">Microsoft
</li>
<li class="dir">Apple
<li>Google
</li>
<li>SAP
</li>
<li>Intuit
</li>
<li>Salesforce
</li>
<li>Oracle
</li>
<li>Other
</li>
</ul>
<li>Personal Development
<ul>
<li class="dir">Personal Transformation
</li>
<li class="dir">Productivity
<li>Leadership
</li>
<li>Personal Finance
</li>
<li>Career Development
</li>
<li>Parenting & Relationships
</li>
<li>Happiness
</li>
<li>Religion & Spirituality
</li>
<li>Personal Brand Building
</li>
<li>Creativity
</li>
<li>Influence
</li>
<li>Self Esteem
</li>
<li>Stress Management
</li>
<li>Memory and Study Skills
</li>
<li>Motivation
</li>
<li>Other
</li>
</ul>
<li>Design
<ul>
<li class="dir">Web Design
</li>
<li class="dir">Graphic Design
<li>Design Tools
</li>
<li>User Experience
</li>
<li>Game Design
</li>
<li>Design Thinking
</li>
<li>3D & Animation
</li>
<li>Fashion
</li>
<li>Architectural Design
</li>
<li>Interior Design
</li>
<li>Other
</li>
</ul>
<li>Marketing
<ul>
<li class="dir">Digital Marketing
</li>
<li class="dir">Search Engine Optimization
<li>Social Media Marketing
</li>
<li>Branding
</li>
<li>Marketing Fundamentals
</li>
<li>Analystics & Automation
</li>
<li>Public Relations
</li>
<li>Advertising
</li>
<li>Video & Mobile Marketing
</li>
<li>Content Marketing
</li>
<li>Non-Digital Marketing
</li>
<li>Growth Hacking
</li>
<li>Affiliate Marketing
</li>
<li>Product Marketing
</li>
<li>Other
</li>
</ul>
<li>Lifestyle
<ul>
<li class="dir">Life Hacks
</li>
<li class="dir">Arts & Crafts
</li>
<li class="dir">Food & Beverage
<li>Beauty & Makeup
</li>
<li>Travel
</li>
<li>Gaming
</li>
<li>Home Improvement
</li>
<li>Pet Care & Training
</li>
</ul>
<li>Photography
<ul>
<li class="dir">Digital Photography
</li>
<li class="dir">Photography Fundamentals
</li>
<li class="dir">Portraits
<li>Landscape
</li>
<li>Black & White
</li>
<li>Photography Tools
</li>
<li>Mobile Photography
</li>
<li>Travel Photography
</li>
<li>Commercial Photography
</li>
<li>Wedding Photography
</li>
<li>Video Design
</li>
<li>Other
</li>
</ul>
<li>Health & Fitness
<ul>
<li class="dir">Fitness
</li>
<li class="dir">General Health
</li>
<li class="dir">Sports
<li>Nutrition
</li>
<li>Yoga
</li>
<li>Mental Health
</li>
<li>Dieting
</li>
<li>Self Defense
</li>
<li>Safety & First Aid
</li>
<li>Dance
</li>
<li>Meditation
</li>
<li>Other
</li>
</ul>
<li>Language
<ul>
<li class="dir">English
</li>
<li class="dir">Spanish
</li>
<li class="dir">German
<li>French
</li>
<li>Japanese
</li>
<li>Portuguese
</li>
<li>Chinese
</li>
<li>Russian
</li>
<li>Latin
</li>
<li>Arabic
</li>
<li>Hebrew
</li>
<li>Italian
</li>
<li>Other
</li>
</ul>
<li>Music
<ul>
<li class="dir">Instruments
</li>
<li class="dir">Production
</li>
<li class="dir">Music Fundamentals
<li>Vocal
</li>
<li>Music Techniques
</li>
<li>Music Software
</li>
<li>Other
</li>
</ul>
<li>Academics
<ul>
<li class="dir">Social Science
</li>
<li class="dir">Math & Science
</li>
<li class="dir">Humanities
</ul>
</ul>
</nav>
<!-- end of info nav -->
<div id='course_div'>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Excel Excel Excel Excel Excel Excel
</div>
</div>
</a>
<a href='#'>
<div class='course_main'>
<img src='https://udemy-images.udemy.com/course/480x270/236832_f09d_19.jpg' id='course_img'>
<div id='course_info'>
Hi
</div>
</div>
</a>
</div>
</body>
</html>

A jQuery soluction can be jQuery.equalHeights:
https://github.com/mattbanks/jQuery.equalHeights
It will calculate the height of your selector and set the same height to all the elements within your selector.
e.g.
<div class="test">
This is one line of text.
</div>
<div class="test">
This is three lines of text.<br>
This is three lines of text.<br>
This is three lines of text.<br>
</div>
<style type="text/css">
.test{border: solid 1px #f00};
</style>
<script>
$(document).ready(function(){
$('.test').equalHeights();
});
</script>
Another solution can be the use of flexbox, example found here: http://osvaldas.info/flexbox-based-responsive-equal-height-blocks-with-javascript-fallback

Try changing display: inline-block to display: inline-table in the .course_main div in CSS
/* font */
#import url(https://fonts.googleapis.com/css?family=Open+Sans);
/* end of font */
/* clear settings */
body {
padding: 0;
margin: 0;
background: white;
}
/* end of clear settings */
/* nav */
#nav {
width: 1600px;
height: 50px;
background: #009ACD;
}
/* end of nav */
/* info nav */
#primary_nav_wrap
{
width: 1600px;
height: 50px;
background: #1F1F1F;
}
#primary_nav_wrap ul
{
list-style:none;
position:relative;
float:left;
margin:0;
padding:0;
left: 3%;
top: 5px;
}
#primary_nav_wrap ul a
{
display:block;
text-decoration:none;
font-size:15px;
padding: 10px 15px 10px 15px;
font-family: 'Open Sans', sans-serif;
color: white;
}
#primary_nav_wrap ul a:hover {
background: white;
}
#primary_nav_wrap ul li
{
position:relative;
float:left;
margin:0;
padding:0;
}
#primary_nav_wrap ul li:hover a {
color: black;
background: white;
}
#primary_nav_wrap ul li a:hover {
background: white;
}
#primary_nav_wrap ul ul li a:hover {
background: #F4F4F4;
}
#primary_nav_wrap ul ul
{
display:none;
position:absolute;
top:100%;
left:0;
background:#fff;
padding:0;
margin-top: 0.2px;
border: 1px solid #ccc;
border-top: none;
z-index: 50;
}
#primary_nav_wrap ul ul li
{
float:none;
width:200px;
position: relative;
left: 0px;
}
#primary_nav_wrap ul ul a
{
line-height:120%;
padding:7.5px 9px;
}
#primary_nav_wrap ul ul ul
{
top:0;
left:100%
}
#primary_nav_wrap ul li:hover > ul
{
display:block
}
/* end of info nav */
/* course div */
#course_div {
width: 1200px;
position: relative;
left: 180px;
top: 30px;
padding: 10px;
}
#course_img {
width: 216px;
height: 121.5px;
border: 1px solid #ccc;
border-bottom: none;
}
#course_info {
border: 1px solid #ccc;
width: 205.5px;
padding: 5px;
position: relative;
top: -4px;
font-family: 'Open Sans', sans-serif;
font-size: 16px;
}
a .course_main {
text-decoration: none;
color: black;
width: 204px;
}
.course_main {
width: 216px;
display: inline-table;
margin-right: 30px;
-webkit-touch-callout: none; /* iOS Safari */
-webkit-user-select: none; /* Chrome/Safari/Opera */
-khtml-user-select: none; /* Konqueror */
-moz-user-select: none; /* Firefox */
-ms-user-select: none; /* Internet Explorer/Edge */
user-select: none; /* Non-prefixed version, currently
not supported by any browser */
}
/* end of course div */
<!DOCTYPE html>
<html>
<head>
<title> Hacked Genius </title>
<link rel='stylesheet' href='main.css'>
<script src='main.js'></script>
</head>
<body>
<!-- nav -->
<div id='nav'>
</div>
<!-- end of nav -->
<!-- info nav -->
<nav id="primary_nav_wrap">
<ul>
<li>Development
<ul>
<li>Web Development</li>
<li>Mobile Apps</li>
<li>Programming Languages</li>
<li>Game Development</li>
<li>Databases</li>
<li>Software Testing</li>
<li>Software Engineering</li>
<li>Development Tools</li>
<li>E-Commerce</li>
</ul>
</li>
<li>Business
<ul>
<li>Finance</li>
<li>Entrepreneurship</li>
<li>Communications</li>
<li>Management</li>
<li>Sales</li>
<li>Strategy</li>
<li>Operations</li>
<li>Project Management</li>
<li>Business Law</li>
<li>Data and Anylytics</li>
<li>Home Business</li>
<li>Human Resources</li>
<li>Industry</li>
<li>Media</li>
<li>Real Estate</li>
<li>Other</li>
</ul>
</li>
<li>IT & Software
<ul>
<li class="dir">IT Certification</li>
<li class="dir">Network & Security
<li>Hardware</li>
<li>Operating Systems</li>
<li>Other</li>
</ul>
<li>Office Productivity
<ul>
<li class="dir">Microsoft</li>
<li class="dir">Apple
<li>Google</li>
<li>SAP</li>
<li>Intuit</li>
<li>Salesforce</li>
<li>Oracle</li>
<li>Other</li>
</ul>
<li>Personal Development
<ul>
<li class="dir">Personal Transformation</li>
<li class="dir">Productivity
<li>Leadership</li>
<li>Personal Finance</li>
<li>Career Development</li>
<li>Parenting & Relationships</li>
<li>Happiness</li>
<li>Religion & Spirituality</li>
<li>Personal Brand Building</li>
<li>Creativity</li>
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Hide CSS menu on click

Any idea how I can hide this dropdown when any item is clicked on? return it to its resting state? I want it to be hidden mainly for mobile users. It works fine as is right now, but on mobiles it stays open until another element of the page "happens" to be clicked on.
HTML
<div class="menubar">
<ul class="menu">
<li class="menu"><div onClick="loadPage('home.html');">HOME</div></li>
<li class="menu"><div onClick="">PRODUCTS <img src="images/darrow.gif" border=0></div>
<ul class="menu">
<li class="menu"><div onClick="loadPage('products.html');">View All Products</div></li>
<li class="menu"><div onClick="loadPage('cargolite.html');">Car-Go Lite</div></li>
<li class="menu"><div onClick="loadPage('cargolitextreme.html');">Car-Go Lite Xtreme</div></li>
<li class="menu"><div onClick="loadPage('pup.html');">P'Up</div></li>
<li class="menu"><div onClick="loadPage('twist.html');">Twist</div></li>
<li class="menu"><div onClick="loadPage('wazat.html');">Wazat</div></li>
</ul>
</li>
<li class="menu"><div onClick="">DOWNLOADS <img src="images/darrow.gif" border=0></div>
<ul class="menu">
<li class="menu"><div onClick="loadPage('brochures.html');">Brochures</div></li>
<li class="menu"><div onClick="loadPage('manuals.html');">Manuals</div></li>
</ul>
</li>
<li class="menu"><div onClick="">DEALERS <img src="images/darrow.gif" border=0></div>
<ul class="menu">
<li class="menu"><div onClick="loadPage('dealers_us.html');">United States</div></li>
<li class="menu"><div onClick="loadPage('dealers_ww.html');">Worldwide</div></li>
</ul>
</li>
<li class="menu"><div onClick="loadPage('about.html');">ABOUT</div></li>
<li class="menu"><div onClick="loadPage('contact.html');">CONTACT US</div></li>
</ul>
</div>
CSS
ul.menu {z-index: 1000; text-align: center; margin: 0; padding: 0px; list-style: none; display: inline; color: #FFFFFF;}
ul.menu li.menu {z-index: 1000; color: #FFFFFF; line-height: 40px; padding-left: 15px; padding-right: 15px; font-family: Arial,
Helvetica, sans-serif; font-weight: bold; position: relative; background: #000000; cursor: pointer; display: inline-block;}
ul.menu li.menu:hover{z-index: 1000; background: #505050; color: #FFFFFF;}
ul.menu li.menu ul.menu{z-index: 1000; color: #FFFFFF; left: 0; padding:0; position: absolute; width: 160px; visibility: hidden;
display: none; border: 1px #000000 solid; border-bottom: none;}
ul.menu li.menu ul.menu li.menu{z-index: 1000; font-size: 12pt; padding: 4px; text-align: left; background: #F97300; display:
block; color: #FFFFFF; border-bottom: 1px #000000 solid; line-height: 30px;}
ul.menu li.menu ul.menu li.menu:hover{z-index: 1000; background: #E0E0E0; color: #000000;}
ul.menu li.menu:hover ul.menu{z-index: 1000; display: block; visibility: visible; opacity: .8;}
jsfiddle http://jsfiddle.net/omvvL5z5/1/

Use the JQuery $(".menubar").toggle() function inside a function you call when you click on a item.
http://api.jquery.com/toggle/
This is the code I tried on jsfiddle: Try three
<div class="menubar">
<ul class="menu">
<li class="menu"><div onClick="loadPage('home.html');">HOME</div></li>
<li class="menu"><div onClick="" class = "button">PRODUCTS <img src="images/darrow.gif" border=0></div>
<ul class="menu">
<li class="menu"><div onClick="loadPage('products.html');">View All Products</div></li>
<li class="menu"><div onClick="loadPage('cargolite.html');">Car-Go Lite</div></li>
<li class="menu"><div onClick="loadPage('cargolitextreme.html');">Car-Go Lite Xtreme</div></li>
<li class="menu"><div onClick="loadPage('pup.html');">P'Up</div></li>
<li class="menu"><div onClick="loadPage('twist.html');">Twist</div></li>
<li class="menu"><div onClick="loadPage('wazat.html');">Wazat</div></li>
</ul>
</li>
<li class="menu"><div onClick="" class = "button">DOWNLOADS <img src="images/darrow.gif" border=0></div>
<ul class="menu">
<li class="menu"><div onClick="loadPage('brochures.html');">Brochures</div></li>
<li class="menu"><div onClick="loadPage('manuals.html');">Manuals</div></li>
</ul>
</li>
<li class="menu"><div onClick="" class = "button">DEALERS <img src="images/darrow.gif" border=0></div>
<ul class="menu">
<li class="menu"><div onClick="loadPage('dealers_us.html');">United States</div></li>
<li class="menu"><div onClick="loadPage('dealers_ww.html');">Worldwide</div></li>
</ul>
</li>
<li class="menu"><div onClick="loadPage('about.html');" class = "button">ABOUT</div></li>
<li class="menu"><div onClick="loadPage('contact.html');" class = "button">CONTACT US</div></li>
</ul>
</div>
Then just put in your other jquery
instead of what I did try
$('.menu > ul > li').click(function() {
$('.menu > ul.menu').toggle();
});
$('.button').hover(function(){$('.menu > ul.menu').show();});
You may also use something like bootstrap: http://getbootstrap.com/components/#navbar

Please give this CSS for mobile css
.menubar{
display:none;
}

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