Adding and removing and toggle CSS classes is a effective method to highlight changes in web pages. jQuery provides different Attributes for .addClass(), .removeClass() and toggleClass methods.
addClass():
jQuery:
<script type=”text/javascript”>
$(document).ready(function(){
$(”p.list”).click(function(){
$(this).addClass(”active”);
});
});
</script>
The CSS:
<style type=”text/css”>
p{
float: left;
width: 33.3%;
padding: 0;
margin: 0;
}
.block {
margin-right: 10px;
padding: 20px;
background: #fff;
}
.active {background: #ccc;}
</style>
removeClass():
jQuery:
$(document).ready(function(){
$(”p.list”).click(function(){
$(this).removeClass(”list”);
});
});
The CSS:
<style type=”text/css”>
p {
float: left;
width: 33.3%;
padding: 0;
margin: 0;
margin-right: 10px;
padding: 20px;
}
.list{
margin-right: 10px;
padding: 20px;
background: #CCCCCC;
}
</style>
toggleClass():
jQuery:
<script>
$(document).ready(function(){
$(”p.list”).click(function(){
$(this).toggleClass(”active”);
});
});
</script>
The CSS:
<style type=”text/css”>
p{
float: left;
width: [...]

To understand search engines and search engine marketing, one must first understand the search engine model. There are two fundamentally different types of search engine back ends: site directories and spidering search engines. Site directory databases are built by a person manually inputting data about websites. Most directories include a site’s url, title, and description [...]

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JavaScript is an Object Oriented Programming Language. It is completely centered around objects. May if you are newer you have question about What is an object? so the very short answer is everything is object.
In the context of a web page, a JavaScript object is any scriptable HTML element – that is any HTML [...]

This article explain you how to create an object which rotate around the center continiously. In this tutorial you will learn more about the center and math, sine/cos/degrees/radians. Here I am going to explain you with the action script:
First Create an object of any shape which you want to rotate around the circle. And [...]