Develop Reference

Select/Unselect images in a list

I am creating an album feature in which the user can select photos from a group of photos, then apply them to a folder. The issue is, I am having trouble selecting specific photos and applying certain attributes to them (mainly css style, I want a border around the image when selected).
Here is the html/jquery:
HTML
<div class="demo-gallery">
<ul id="lightgallery" class="list-unstyled grid">
<?php foreach ( $media_items as $item ): ?>
<li>
<img class="img-responsive" id="lazy" data-src="<?php echo $item->image_path_sd; ?>">
</li>
<?php endforeach; ?>
</ul>
</div>
Jquery
var picture = document.querySelectorAll('#lazy');
$(picture).each(function () {
$(document).on('click', /*???*/, function () {
if ($(/*???*/).data('clicked', true)) {
$(/*???*/).css("border", "none");
$(/*???*/).data('clicked', false);
} else {
$(/*???*/).css("border", "4px solid #00CE6F");
$(/*???*/).data('clicked', true);
console.log($(/*???*/).data());
}
});
});
My guess is I need to figure out what goes where all of the ??? comments are, however, I could be trying this in the wrong direciton.
When I console.log(picture), I get an array of every photo. When I console.log(picture[2]), it shows the third picture. This is what I want, but how am I to apply these attributes to each individual photo?
Overall: I want user to click on photos they want, applying a highlighted border around the photo to let them know it's currently selected.

As you are using jQuery, there's no need to use document functions, you can grab the list of items when you select something that can be applied to multiple items (like a class name).
The key here is with jQuery, .each(function(){ }) passes in the element itself, which you can access using this. using $(pictures).each() lets you access each individual element in that set.
So, rather than applying a single click listener on the document, you can place a click listener on each img itself.
To show the border, place the style in the css file as a class and use the $().toggleClass(/* class name */) function.
var pictures = $('.lazy');
$(pictures).each(function () {
// apply click listener to each image
$(this).on('click', function () {
// toggle the checked value
if ($(this).data('clicked') == true) {
$(this).data('clicked', false);
} else {
$(this).data('clicked', true);
}
// toggles the border
$(this).toggleClass('selected');
// display contents of all the items
$(pictures).each(function(index){
console.log('img #' + index + ': ' + $(this).data("clicked"))
})
});
});
.lazy {
padding: 10px;
display: inline;
background-color: red;
margin: 10px;
}
.selected {
border: 2px solid black;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<!-- Replace with PHP foreach -->
<img class="lazy" src="#">
<img class="lazy" src="#">
<img class="lazy" src="#">
<img class="lazy" src="#">
<img class="lazy" src="#">
<!-- Replace with PHP foreach -->
Simplified
The other answers reminded me that this whole block can be condensed to the following code:
$('.lazy').on('click',function(){
$(this).toggleClass('selected');
})
.lazy {
background-color: red;
padding: 10px;
box-sizing: border-box;
}
.selected {
border: 2px solid black;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<img class="lazy" src="#">
<img class="lazy" src="#">
<img class="lazy" src="#">
<img class="lazy" src="#">
<img class="lazy" src="#">
when you submit, just use $('.lazy.selected') to grab all the selected items.

You cannot use an identical id selector for multiple tags on the same HTML document, instead, use ".lazy" class selector.
then you can do something like this.
css:
.selected-image{
border:1px solid #000;
}
jquery:
$(".lazy").click(function(){
const img = $(this)
if(img.hasClass("selected-image")){
img.removeClass("selected-image")
}
else{
$(this).addClass("selected-image")
}
})

Javascript - Onclick toggle between image size

I have multiple images, say image A, image B and image C. When I click image A I want it to enlarge. When I then click on image B I want image A to revert back to its original size and B to enlarge.
Here is the codepen im working off: https://codepen.io/anon/pen/BWXrEv
Help would be much appreciated.
Html Code:
<img class="image" src="http://images.e-flux-
systems.com/646a999d89943180a9b4916b17fd7bac.jpg,2000" alt="" />
<img class="image" src="http://images.e-flux-
systems.com/2012_09_01the_internet.jpg,1440" alt="" />
Css:
.image {
width: 150px;
}
.image.enlarge {
width: 600px;;
}
JS:
$(document).ready(function() {
$('.image').click(function() {
$(this).toggleClass('enlarge');
});
});

I think a quick fix is to remove the .enlarge class from all images before adding the class to another image. Try this:
$(document).ready(function() {
$('.image').click(function() {
$('.image').removeClass('enlarge');
$(this).addClass('enlarge');
});
});
Hopefully this works!
Also, you have an extra semicolon in your CSS, so watch out for that!

First you have to remove the existing .enlarge class from all of the existing element where class name is .image if any and add the .enlarge class only on the current clicked element.
$(document).ready(function() {
$('.image').click(function() {
$(".image").removeClass('enlarge');
$(this).toggleClass('enlarge');
});
});
.image {
width: 150px;
}
.image.enlarge {
width: 600px;
;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<img class="image" src="http://images.e-flux-systems.com/646a999d89943180a9b4916b17fd7bac.jpg,2000" alt="" />
<img class="image" src="http://images.e-flux-systems.com/2012_09_01the_internet.jpg,1440" alt="" />

Hover and Click image to reveal content (With initial content displayed)

I'm trying to figure out how to get the following to work:
When initially loaded, content on the right for the initial image is displayed (and should be coloured).
On hover over the images, the images will change to colour and the content for that image will appear on the right hand side.
On Click the content will stay in the right hand side and the image will stay coloured as it is the selected content.
I understand you could just make the images simply have a rollover feature using CSS for the coloured images to appear, however I am unaware how to make the image stay coloured when clicked and how to make the content in the right appear, which I assume would be possible to do using Jquery or Javascript.
What it looks like:
http://i.stack.imgur.com/73oFL.png
<ul id="testb">
<li id="companies">
<img src="images/linkedin.gif" width="120" height="95" alt="" />
<img src="images/specsavers.gif" width="100" height="95" alt="" />
<img src="images/avc.gif" width="110" height="95" alt="" />
</li>
<li id="testcont">content here</li></ul>
#testb{
width:950px;
margin:0 auto;
list-style:none;
padding:0;
}
#companies{
width:440px;
float:left;
list-style:none;
padding:85px 0 45px 0;
margin:0;
height:130px;
display:block;
}
#testcont{
float:left;
width:395px;
height:170px;
padding:45px 0 45px 70px;
margin:0;
background: url(images/testglow.gif) no-repeat;
}
If you could help out it would be really appreciated.
Thanks

Even tho NewToJS is absolutely right, sometimes a little free source code might help you get started:
var contentValues = ["slide 1 content", "slide 2 content", "slide 3 content"];
var contentColors = ["#333333", "#777777", "#000000"];
$(function() {
$("#companies img").on("mouseover", function()
{
console.log($(this).data("slide"));
$("#testcont").html(contentValues[$(this).data("slide")]);
$("#testcont").css("background-color",contentColors[$(this).data("slide")]);
});
$("#companies img").on("click", function()
{
console.log($(this).data("slide"));
$("#companies img").css("background-color", "transparent")
$(this).css("background-color", contentColors[$(this).data("slide")]);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id="testb">
<li id="companies">
<img data-slide="0" src="images/linkedin.gif" width="120" height="95" alt="" />
<img data-slide="1" src="images/specsavers.gif" width="100" height="95" alt="" />
<img data-slide="2" src="images/avc.gif" width="110" height="95" alt="" />
</li>
<li id="testcont">content here</li>
</ul>

Simplify this javascript for Show one, Hide Rest

I am using a script for a gallery in which clicking on an element in the navigation shows only one div, but hides the others.
Currently my script is very specific, as I need to add a new function for every possible instance. See below... You can imagine this grows out of control easily the more images are added.
Can someone help me make this code more generic and elegant? I'm not very experienced with Javascript/JQuery but this is getting a bit embarrassing lol
So in case it's not clear from the code: the #li1, #li2, #li3 etc are the navigational thumbnails which are always visible. The #img1, #img2, #img3 etc. are the variable displayed divs. When one is visible, the rest should be hidden.
Additional questions:
for every #img1 displayed, I'd like to also show a title in a separate div, let's say #title1, #title2, etc. How do I do this? So eg clicking #li1 would show #img1 and #title1 but hide all other #img.. and #title..
all #'s contain images. I've noticed that when one of the images is broken, the whole script stops working properly (all #img.. divs show at once). Why is that?
this script doesn't actually hide all the images until everything is loaded, which you don't notice when running the HTML locally, but you do when you're waiting for the images to download. I'm suspecting because the $("#li1").load(function() refers to a div that is further down in the document. How can I counter this?
I hope I'm not asking too much, I've tried to understand this myself but I can't figure it out.
$("#li1").load(function() {
$("#img2, #img3, #img4, #img5, #img6, #img7, #img8, #img9, #img10, #img0, #intro").hide();
$("#img1").show();
});
$("#li1").on('click', function() {
$("#img2, #img3, #img4, #img5, #img6, #img7, #img8, #img9, #img10, #img0").hide();
$("#img1").show();
});
$("#li2").on('click', function() {
$("#img1, #img3, #img4, #img5, #img6, #img7, #img8, #img9, #img10, #img0").hide();
$("#img2").show();
});
$("#li3").on('click', function() {
$("#img2, #img1, #img4, #img5, #img6, #img7, #img8, #img9, #img10, #img0").hide();
$("#img3").show();
});
etc.

I would probably try something like this:
Thumbnails like:
<li class="thumbnail" data-imageId="0">
...thumbnail...
</li>
<li class="thumbnail" data-imageId="1">
...thumbnail...
</li>
<li class="thumbnail" data-imageId="2">
...thumbnail...
</li>
Images like:
<div class="image" data-imageId="0">
...image...
</div>
<div class="image" data-imageId="1" style="display: none;">
...image...
</div>
<div class="image" data-imageId="2" style="display: none;">
...image...
</div>
<!-- The style attribute in these element hides the element by default,
while still allowing jQuery to show them using show(). -->
And then the JS:
$(".thumbnail").click(function() {
// Hides all images.
$(".image").hide();
// Shows appropriate one.
var imageId = $(this).data("imageId"); // Fetches the value of the data-imageId attribute.
$(".image[data-imageId="+imageId+"]").show();
});

I see that your li's have ids of 'li1', 'li2', etc. Assign them all a specific class, like 'liLinks'.
Then, add an event handler for that class like this:
$(".liLinks").click(function(){
var ImageToShow = $(this).prop("id").replace("li", ""); // This gets the number of the li
for (i=0; i<= 10; i++){ //or however many images you have
if (i != ImageToShow)
$("#img" + i).hide();
else
$("#img" + i).show();
}
});
Oh, and you can show and hide any other elements with the same method used above. Just make sure their naming convention is the same, and you should be all set!

So, I have two solutions for you:
First option: Edit the HTML code to fix this logic:
<li class="nav" data-image="0">0</li>
<li class="nav" data-image="1">2</li>
<li class="nav" data-image="2">3</li>
...
...and so on.
Now the JavaScript code will be pretty short and easy, here it is:
function showOne(e) {
var max = 5, // assuming that there are 5 images, from #img0 to #img4
toShow = e.target.dataset.image;
for (var i=0; i < max; i++) {
if (i == toShow) $('#img'+i).hide();
else $('#img'+i).show();
}
}
$('.nav').bind('click', showOne);
If your logic isn't this one then i suggest you to edit the HTML to fix this logic, which is the easiest way to do what you want.
Second option: I am assuming that you use a logic like this:
#li0 shows #img0
#li1 shows #img1
#li2 shows #img2
...
#liN shows the Nth img of the array
Here's the code then:
function showOne() {
var max = 4, // assuming that there are 5 images, from #img0 to #img4
toShow = this.id.substr(2);
$('#img'+toShow).show();
for (var i=0; i < max; i++) {
if (i != toShow) $('#img'+i).hide();
}
}
$('#li0, #li1, #li2, #li3, #li4').bind('click', showOne);
In this snippet I only used 5 images, but you can add more images changing the max value and adding the relative li elements in the $('#li0, #li1, ...) selector.

Just hide all of them with CSS, then override the one you care about to show.
<!doctype html>
<html>
<head>
<style type="text/css">
#showbox img { display: none; width: 300px; }
#showbox.show1 img#img1,
#showbox.show2 img#img2,
#showbox.show3 img#img3,
#showbox.show4 img#img4 { display: block; }
</style>
</head>
<body>
<div id="showbox" class="3">
<img id="img1" src="http://upload.wikimedia.org/wikipedia/commons/6/6f/ChessSet.jpg">
<img id="img2" src="http://upload.wikimedia.org/wikipedia/commons/c/c3/Chess_board_opening_staunton.jpg">
<img id="img3" src="http://www.umbc.edu/studentlife/orgs/chess/images/News%20and%20Events/chess_sets.jpg">
<img id="img4" src="http://upload.wikimedia.org/wikipedia/commons/thumb/9/97/Russisches_festungsschach.PNG/350px-Russisches_festungsschach.PNG">
</div>
<input onchange="document.getElementById('showbox').className = 'show' + this.value;">
</body>
</html>

Your images is not hidden while the images is loading because you didn't use
$(function () {
$("imgs").hide ();
});
This function is excuted when the DOM (HTML) is loaded not the images.
The code will be "HTML":
link1
link2
link3
...
jQuery:
$(function () {
$(".img").hide ();
$(".nav").click (function (e) {
$(".img").show ();
});
});
As you might expect you need to change this code to be more progressive but you now get the idea of making them hidden when the page finish liading not when the images finish downloading. And good luck ;) .

var $img = $('#images img'); /* Cache your selector */
$('#nav li').click(function(){
$img.fadeOut().eq( $(this).index() ).stop().fadeIn();
});
#images{ position:relative; }
#images img{ position:absolute; left:0; }
#images img + img {display:none; } /* hide all but first */
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<ul id=nav>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
<div id=images>
<img src="//placehold.it/50x50/cf5" alt="">
<img src="//placehold.it/50x50/f0f" alt="">
<img src="//placehold.it/50x50/444" alt="">
</div>

Following is an approach:
Add special classes to identify images.
Use classes to show/hide image like: .showing{display:block;}
Use data attribute to store title like: data-title="title"
Add class to identify li and mark selected li with another class like active
$(function() {
$("li.switch").click(function() {
var liActive = $("li.active");
var imgActive = liActive.data("image");
$(imgActive).removeClass("showing").addClass("hidden");
$(liActive).removeClass("active");
//currently clicked li
var $this = $(this);
$this.addClass("active");
var d = $this.data("image");
$(d).removeClass("hidden").addClass("showing");
$("#imgTitle").text($(d).data("title"));
});
});
.gallery {
width: 250px;
height: 250px;
padding: 10px;
}
img {
height: 200px;
width: 200px;
margin: auto auto;
}
.hidden {
display: none;
}
.showing {
display: inline-block;
}
ul {
list-style: none none outside;
display: inline;
}
li {
list-style: none none outside;
display: inline-block;
padding: 3px 6px;
border: 1px solid grey;
color: #0f0;
cursor: pointer;
}
li.active {
border: 2px solid red;
background-color: #c0c0c0;
color: #f00;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="gallery">
<img src='https://c2.staticflickr.com/4/3862/15320672416_65b28179b4_c.jpg' class='gimage showing' id='img1' data-title="This is image 1" />
<img src='https://c2.staticflickr.com/4/3893/15156335390_16e16aa1c9_c.jpg' class='gimage hidden' id='img2' data-title="This is image 2" />
<img src='https://c1.staticflickr.com/3/2942/15341799225_09d0f05098_c.jpg' class='gimage hidden' id='img3' data-title="This is image 3" />
<img src='https://c2.staticflickr.com/4/3907/15339877992_695dd1daae_c.jpg' class='gimage hidden' id='img4' data-title="This is image 4" />
<img src='https://farm3.staticflickr.com/2942/15333547162_325fefd6d1.jpg' class='gimage hidden' id='img5' data-title="This is image 5" />
</div>
<div id="imgTitle"></div>
<ul>
<li class="switch active" id="li1" data-image="#img1">1</li>
<li class="switch" id="li1" data-image="#img2">2</li>
<li class="switch" id="li1" data-image="#img3">3</li>
<li class="switch" id="li1" data-image="#img4">4</li>
<li class="switch" id="li1" data-image="#img5">5</li>
</ul>
Try it in this fiddle

Fix from Ricardo van den Broek's code, because
var imageId = $(this).data("imageId");
is seem doesn't work. It's returns "Undefined". So we need to change it to
var imageId = $(this).attr("data-imageId");
Here is all the code,
HTML (Thumbnail section)
<ul>
<li class="thumbnail" data-imageId="0">
Thumbnail 0
</li>
<li class="thumbnail" data-imageId="1">
Thumbnail 1
</li>
<li class="thumbnail" data-imageId="2">
Thumbnail 2
</li>
</ul>
HTML (Image section)
<div class="image" data-imageId="0">
Image 0
</div>
<div class="image" data-imageId="1" style="display: none;">
Image 1
</div>
<div class="image" data-imageId="2" style="display: none;">
Image 2
</div>
JavaScript (jQuery)
$(".thumbnail").click(function() {
$(".image").hide();
// Shows the appropriate one.
var imageId = $(this).attr("data-imageId");
$(".image[data-imageId="+imageId+"]").show();
});

Adding changing text onclick to JavaScript gallery

I'm trying to set up a simple gallery with thumbnails and a main content section. When a thumbnail is clicked, I would like a larger version of the image along with text to display in the main content section. I've got the code for the images down, but can't figure out how to add text on each click. I haven't started doing any styling yet, but the basic code is below. Any help would be much appreciated.
Thanks!
JavaScript:
var mainImg = document.getElementById('Main');
document.getElementById('One').onclick = function() {
mainImg.src = 'http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297';
mainImg.innerHTML = imagetitle;
//alert('one clicked');
};
document.getElementById('Two').onclick = function() {
mainImg.src = 'http://cdn.shopify.com/s/files/1/0176/5914/files/Mason_Hunter_Thornal.jpg?7297';
mainImg.innerHTML = 'imagetitle';
//alert('two clicked');
};
document.getElementById('Three').onclick = function() {
mainImg.src = 'http://cdn.shopify.com/s/files/1/0176/5914/files/Joseph_Nunez_4afb23ac-d71e-42a0-9366-ac78d65deaf4.jpg?7297';
//alert('two clicked');
};
CSS:
#One, #Two, #Three {
width:100px;
opacity: .5; /* css standard */
filter: alpha(opacity=50); /* internet explorer */
}
#One:hover, #Two:hover, #Three:hover {
width:100px;
opacity: 1; /* css standard */
filter: alpha(opacity=100); /* internet explorer */
}
HTML:
<img id="Main" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297" alt="" />
<img id="One" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297" alt="" />
<img id="Two" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Mason_Hunter_Thornal.jpg?7297" alt="" />
<img id="Three" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Joseph_Nunez_4afb23ac-d71e-42a0-9366-ac78d65deaf4.jpg?7297" alt="" />
http://jsfiddle.net/f9B8H/72/

Let's clean this up a bit.
HTML
<div id="container">
<img id="Main" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297" alt="" />
<p id="caption"></p>
</div>
<img id="One" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297" alt="I'm a soldier" />
<img id="Two" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Mason_Hunter_Thornal.jpg?7297" alt="My family" />
<img id="Three" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Joseph_Nunez_4afb23ac-d71e-42a0-9366-ac78d65deaf4.jpg?7297" alt="Dad" />
Notice how I've stored the caption in the alt attribute. A data attribute could also work.
JAVASCRIPT
function displayImage() {
var mainImg = document.getElementById('Main');
var caption = document.getElementById('caption');
mainImg.src = this.src;
caption.innerHTML = this.alt;
}
document.getElementById('One').onclick = displayImage;
document.getElementById('Two').onclick = displayImage;
document.getElementById('Three').onclick = displayImage;
Fiddle: http://jsfiddle.net/g2hY4/
The simplified function works so well because you are using the same image for thumbnail as main image. If you didn't do that, we could store the big image address in a data attribute also.
Here's one way to load the first caption when the page loads. Put it after the code I've already shown you:
displayImage.call(document.getElementById('One') );
You can read about call here. In a nutshell, it redefines the value of this in the displayImage function.
New fiddle
Something to think about is where you want the caption and how it's styled can be set in CSS. I've left that to you also. Absolute positioning will work if the positioning of #container is set to relative.

My implementation gets the text from the attribute alt(could be title) I think this way can be more elegant
document.getElementById('textSubtitle').innerHTML = this.alt;
http://jsfiddle.net/WKfc5/

If you are okay with using jQuery, here is something that I made up real quick. I hope it is useful. [Fiddle]
HTML
<div id="gallery">
<div class="preview">
<img class="previewImg" src="http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297" alt="" title="" />
<div class="previewText"></div>
</div>
<div class="thumbnails">
<a href="javascript: void(0);">
<img src="http://cdn.shopify.com/s/files/1/0176/5914/files/Kaylee_Radzyminski.jpg?7297" alt="" title="Image 1" />
</a>
<a href="javascript: void(0);">
<img src="http://cdn.shopify.com/s/files/1/0176/5914/files/Mason_Hunter_Thornal.jpg?7297" alt="" title="Image 2" />
</a>
<a href="javascript: void(0);">
<img src="http://cdn.shopify.com/s/files/1/0176/5914/files/Joseph_Nunez_4afb23ac-d71e-42a0-9366-ac78d65deaf4.jpg?7297" alt="" title="Image 3" />
</a>
</div>
</div>
CSS
#gallery {
overflow: hidden;
}
#gallery .preview {
float: left;
position: relative;
}
#gallery .previewImg {}
#gallery .previewText {
position: absolute;
right: 0;
bottom: 0;
left: 0;
height: 100px;
background: rgba(0,0,0,0.7);
color: #fff;
font: normal 12px arial;
padding: 10px;
}
#gallery .thumbnails {
float: left;
width:100px;
}
#gallery .thumbnails a, #gallery .thumbnails img {
display: block;
}
#gallery .thumbnails a img {
width: 100%;
opacity: .5; /* css standard */
filter: alpha(opacity=50); /* internet explorer */
}
#gallery .thumbnails a:hover img {
opacity: 1; /* css standard */
filter: alpha(opacity=100); /* internet explorer */
}
JS
$(function(){
var gallery = $("#gallery"),
thumbnails = gallery.find(".thumbnails a"),
previewImg = gallery.find(".previewImg"),
previewText = gallery.find(".previewText");
thumbnails.on("click", function(e){
var thumbImg = $(this).find("img");
previewImg.attr("src", thumbImg[0].src);
previewText.html(thumbImg[0].title);
});
});

I'd call the onclick from the image itself instead of adding the onclick via JS to the image.
You're doubling your work.
Where do you want the text to be displayed?
If it has to be displayed on top of the image, you'll have to make the image a background-image of a div or so.
If the text has to be above/under the image, place a span above/under the image and give it an ID.
Working with a span
JS:
function showBig(srcBig, title) {
var mainImg = document.getElementById('MainImg');
var mainText = document.getElementById('MainText');
mainImg.src = srcBig;
mainImg.title = title;
mainText.innerHTML = title;
}
HTML:
<div id="main">
<span id="MainText">Title will come here</span>
<img src="Default Img" alt="Big img's will come here" />
</div>
<img src="URL of thumbnail (e.g. smaller version)" alt="" onClick="showBig('URL of big version', 'Title')" />
Working with BG-image
JS:
function showBig(srcBig, title) {
var mainDiv = document.getElementById('MainDiv');
MainDiv.style.backgroundImage = srcBig;
MainDiv.innerHTML = title;
}
HTML:
<div id="MainDiv">
</div>
<img src="URL of thumbnail (e.g. smaller version)" alt="" onClick="showBig('URL of big version', 'Title')" />
By the way, you can ofc still add the onClicks via JS:
document.getElementById("yourImg").onclick = showBig('URL of Big', 'Title');
By the way, Don't use the same img for the thumbnails.
You'll probably use some big images which takes longer to load and then display it much smaller via CSS.
Make a smaller version (e.g. 100x100px or whatever size the thumbs should be) and only load the bigger version when the onClick is called.
Also, you better use a CSS-class like .thumbs to style the thumbs.
Otherwise you'll have to add a new ID to the list in your CSS file everytime you add a new image.
JSFiddle