JavaScript removes all the css style information - javascript

I'm a newbie to web development. And so, I've just created a sample webpage. It contains an html page, a css file and a JavaScript file. But whenever this JavaScript is linked to the html page, the css formattings are removed. This happens only after linking the JS file. If the same link is removed, css works fine. could u tell me the problem. i'm using windows xp sp3 and google chrome latest. is it the problem with the browser.
Here are my codes
HTML
<!doctype html>
<html>
<head>
<script type="text/javascript" src="JavaScript.js"></script>
<link rel="stylesheet" type="text/css" href="Style.css" media="all">
</head>
<body
<div>
<ul id="nav">
<li id="click" Contact</li>
<li Blog</li>
<li Work</li>
<li About</li>
<li Home</li>
</ul>
</div>
</body>
</html>
JS
var list = document.getElementById("nav")
list.addEventListener("click", function(event) {
switch(event.target.id) {
case "click":
document.title="I changed the document title";
break;
}, false);
CSS
body {
margin: 0;
}
#nav {
list-style-type: none;
margin: 0;
padding: 0;
}
#nav li {
width: 20%;
float: left;
text-align: center;
display: inline;
}
#nav li a {
line-height: 40px;
display: block;
padding: 0.5em 5px;
text-decoration: none;
font-weight: bold;
color: #F2F2F2;
-webkit-box-shadow: 3px 3px 3px rgba(51,51,51,0.3);
box-shadow: 3px 3px 3px rgba(51,51,51,0.3);
}
#nav a:link, #nav a:visited {
background-color: #071726;
}
#nav a:hover, #nav a:active, #nav a:focus {
background-color: #326773;
}

First of all you are not closing your link tag, it should be:
<link rel="stylesheet" type="text/css" href="Style.css" media="all" />
Now regarding your issue. I think you have a problem with the your JavaScript source. Ensure in development tools that your <script type="text/javascript" src="JavaScript.js"></script> actually returns a script - ensure that srs points to the correct location of the script

Made this an answer, since after testing in JSFiddle and comparing it to a fixed version, I suspect it's the source of your problems:
I'd recommend fixing your <body> and <li> opening tags - currently they are being shown as <body and <li respectively, missing their ending braces (>).
This is what your HTML should look like after you fix the problem:
<!doctype html>
<html>
<head>
<script type="text/javascript" src="JavaScript.js"></script>
<link rel="stylesheet" type="text/css" href="Style.css" media="all">
</head>
<body>
<div>
<ul id="nav">
<li id="click">Contact</li>
<li>Blog</li>
<li>Work</li>
<li>About</li>
<li>Home</li>
</ul>
</div>
</body>
</html>

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Ajax call not loading the pages on the main page

I try to load different pages using an ajax call. But the pages are not appearing on the main page.
This is the file:
<!DOCTYPE html>
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<script src="Scripts/jquery.min.js"></script>
<link href="Content/site.css" rel="stylesheet">
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#newslinks li {
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margin-right: 20px;
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#newslinks li a {
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#headlines #newsItem {
margin-top: 10px;
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<script>
$(document).ready(function() {
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<header>
JAVASCRIPT <span class="amp">&</span> jQUERY: THE MISSING MANUAL
</header>
<div class="content">
<div class="main">
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<li>Today’s News</li>
<li>Yesterday’s News</li>
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<footer>
<p>JavaScript & jQuery: The Missing Manual, 3rd Edition, by David McFarland. Published by O'Reilly Media, Inc.</p>
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So you see three links. But if you click on one of the links nothing happens. I am using IIS. And yes it is enabled.
Thank you
Misspelled headlines in $('#healines').load(url + ' #newsItem');.

How to keep drop down navigation open after hover?

Here is a jsbin link to my code. As you can see, the drop down closes as soon as I hover away from the trigger thus making the navigation useless.
Any simple solutions would be very welcome. Thanks in advance.
html
<!DOCTYPE html>
<html>
<head>
<script src="https://code.jquery.com/jquery-2.1.4.js"></script>
<meta charset="utf-8">
<title>JS Bin</title>
</head>
<body>
<header>
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SASS
*
margin: 0
header
padding: 20px
background-color: tomato
p
display: inline
padding: 5px 10px
background-color: blue
color: white
&:hover
cursor: pointer
ul
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$(function(){
$("p").hover(function(){
$("ul").slideToggle();
});
});
$(function(){
$("p").hover(function(){
$("ul").show();
});
$("ul").hover(function(){}, function(){
$(this).hide();
});
});
You don't need JS for this. Use :hover in your css:
header:hover ul {
display:block;
}
http://jsfiddle.net/wfw1f9to/3/

Bootstrap Dropdowns in JQuery .load not working

I am creating a website on github pages using bootstrap, but the drop-down does not seem to be working on the nav bar (sometimes works, sometimes not). I am using $("#nav").load("url");
to load the nav bar so I can change it and have the changes apply to many pages. The drop-downs work on the page that I am loading if I go there directly. The web page is http://scratchos.github.io/index2.html
/resorces/navbar.html
<!DOCTYPE html>
<html lang="en">
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
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<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<script>
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var params = window.location.search.substr(1).split('&');
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<li id="home">Home</li>
<li id="projects">My Projects</li>
<li id="hfb">
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<button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown">Hungry-For-Blocks<span class="caret"></span></button>
<ul class="dropdown-menu">
<li id="hfb-home">Home</li>
<li id="hfb-about">About</li>
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<li id="hfb-ins">Instalation</li>
</ul>
</div>
</li>
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font-size: 11px;
font-weight: bold;
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font-family: 'Shift', sans-serif;
font-weight: bold;
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font-family: 'Shift', sans-serif;
font-size: 18px;
font-weight: bold;
}
.learn-more a {
color: #00b0ff;
}
.forum {
padding: 20px;
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<!DOCTYPE html>
<html lang="en">
<head>
<!--JQuery-->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<!--rendering script in css and jquery for the site, not relevent i think?-->
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<script src="//scratchos.github.io/ScratchBlocks/scratchblocks2.js"></script>
<script>
$(document).ready(function() {
scratchblocks2.parse();
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<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<link rel="stylesheet" href="http://scratchos.github.io/stylesheets/main2.css">
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<style>.jumbotron{background-image:url('https://scratchos.github.io/images/jumbotron.png');}</style>
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<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
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<title>-ScratchOs|Home</title>
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<script>
$(function(){
$("#nav").load("http://scratchos.github.io/resorces/navbar.html");
});
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<script>
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e.preventDefault()
$(this).tab('show')
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</head>
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If you can fix the dropdowns it would be excellent. Thanks :)
I would consider using a script.js file instead of embedding it. If you go to http://scratchos.github.io/resorces/navbar.html it works just fine, the problem is that you're defaulting to your index.html (as you should), but it's not getting the code that you put straight into your navbar.html. Making a script file that both pages reference should fix your issue.
Just remove the plugins that are common in both the pages and that will fix it.

What am I missing to make ScrollSpy work?

I've copied the files from http://jsfiddle.net/ia_archiver/9AgUS/ as such:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<title>MWE Scrollspy</title>
<link rel="stylesheet" type="text/css" href="/path/to/scrollspy.css" />
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<body data-spy="scroll" data-target="#navbar">
<div id="post1" class="box">
<h1>Post 1</h1>
<p> Scroll Down?</p>
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<div id="post2" class="box"><h1>Post 2</h1></div>
<div id="post3" class="box"><h1>Post 3</h1></div>
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<li>Post 1</li>
<li>Post 2</li>
<li>Post 3</li>
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</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="http://twitter.github.com/bootstrap/assets/js/bootstrap-scrollspy.js"></script>
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in scrollspy.html, and:
#import url(http://getbootstrap.com/2.3.2/assets/css/bootstrap.css);
html{ background: #fff;}
.box{
margin: 20px; padding: 15px;
background: #eee;
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width: 100%;
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in scrollspy.css.
I don't see what I'm missing, though the ScrollSpy feature does not work (while all CSS is all right).
Can you help me identify what I'm clearly missing?? Thanks a lot!
UPDATE 2015-04-02: Here is what I get on the console:
HTML1406: Invalid tag start: "<?". Question marks should not start tags.
scrollspy.html, line 1 character 2
HTML1524: Invalid DOCTYPE. The shortest valid doctype is "<!DOCTYPE html>".
scrollspy.html, line 2 character 1
SCRIPT1002: Syntax error
bootstrap-scrollspy.js, line 1 character 1
Not that explicit -- at least to me.
You'll have to reference the bootstrap javascript file (at least from CDN). Your script reference is to the old github hosted file, which is now a redirect to the bootstrap homepage instead of the js file for the scrollspy.
Official CDN:
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JS Fiddle: http://jsfiddle.net/9AgUS/1736/

How to create a navigation side menu?

I just want to add a side menu that links to various pages on my site. I would like to use image buttons or simple hrefs that the user clicks on to navigate. I think I need to use a div somehow ?
Thanks
You can use a div element and float it left with CSS.
HTML:
<div id="nav">
<ul>
<li>A Link</li>
<li>Another Link</li>
</ul>
</div>
<div id="content">
<p> Here's some stuff </p>
</div>
CSS:
#nav {
width: 20%;
float: left;
background-color: gray;
}
#content {
width: 80%;
}
I would also run through the HTML and CSS tutorials at HTML Dog. It will make your life so much easier.
Listamatic has various examples of how to style a list of links
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<!Doctype html>
<html projectReviver="leftmenu.html">
<head>
<title>My Left Menu</title>
<link rel="StyleSheet" href="design.css" type="text/css" />
<!--[if IE]>
<script src="http://html5shim.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
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