This tutorial shows you how to change the CSS file included into your page, using jQuery.
For example, if we have 2 CSS files, "style.css" and "style2.css", we can set a jQuery code to alternate the CSS included into our page, between these two files, when the user clicks on a specific element.

Here's an example, a simple web page with a <div> and a paragraph. When a user clicks on this DIV, a jQuery instruction changes /alternate the css file included into this page, in a <style> tag which has id="stl" (for details, see the comments in code).

The Web page

<!doctype html>
<meta charset="utf-8" />
<title>Change CSS file</title>
<link href="style.css" rel="stylesheet" type="text/css" id="stl" />
<script type="text/javascript" src="jquery_library.js"></script>
<script type="text/javascript"><!--
// the CSS file is chosen  according to the positive or negative value of this variable
var plusmin = 1;

$(document).ready(function() {
  // when click on the element with id="idd"
    plusmin *= -1;        // change the polarity of "plusmin" var
    var stl = plusmin>0 ? 'style.css' : 'style2.css';     // sets the css file, according to plusmin

    // change the css file of the tag with id="stl" and rel="stylesheet"
    $('#stl[rel=stylesheet]').attr('href', stl);
<div id="idd"> Click here:<br />
Alternate the CSS file for this page<br />
Between "style.css" and "style2.css"</div>
<p class="hdp">This paragraph has display:none; in style2.css</p>

style.css file

body { text-align: center; }
#idd {
 width: 200px;
 background: #a7efa8;
 margin: 2px auto;
 border: 2px solid blue;
 padding: 5px 8px;
 text-align: left;
 font-size: 16px;
 cursor: pointer;

style2.css file

#idd {
 width: 300px;
 margin: 2px auto 2px 80px;
 background: #dadafe;
 border: 2px dashed #a0cea1;
 padding: 5px 8px;
 font-size: 16px;
 font-weight: bold;
 text-align: center;
 cursor: pointer;
p.hdp { display: none; }

Click here:
Alternate the CSS file for this page
Between "style.css" and "style2.css"

This paragraph has display:none; in style2.css

Daily Test with Code Example

Which tag is used in <table> to create table header cell?
<thead> <th> <td>
  <th>Title 1</th>
  <th>Title 2</th>
Which CSS property sets the distance between lines?
line-height word-spacing margin
.some_class {
  line-height: 150%;
Which function opens a new browser window.
alert() confirm() open()
document.getElementById("id_button").onclick = function(){"");
Indicate the PHP function that returns an array with names of the files and folders inside a directory.
mkdir() scandir() readdir()
$ar_dir = scandir("dir_name");
Change CSS file with jQuery

Last accessed pages

  1. Countdown Timer with starting time added into a form - V.2 (823)
  2. Countdown Timer with starting time added into a form (6037)
  3. Sonic (1590)
  4. Heart shape with CSS (1635)
  5. innerHTML and outerHTML to Get and Replace HTML content (15094)

Popular pages this month

  1. Qwop (2996)
  2. Get Attribute (ID, Class, Name, Title, Src) with jQuery (2372)
  3. Get the value of the selected /checked checkboxes in a form (1497)
  4. Insert, Select and Update NULL value in MySQL (1339)
  5. Add, Change, and Remove Attributes with jQuery (1225)