<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
$("img.rollover").mouseover(function(){
$(this).attr("src",$(this).attr("src").replace(/^(.+)(\.[a-z]+)$/, "$1_on$2"));
})
.mouseout(function(){
$(this).attr("src",$(this).attr("src").replace(/^(.+)_on(\.[a-z]+)$/, "$1$2"));
})
.each(function(){
$("<img>").attr("src",$(this).attr("src").replace(/^(.+)(\.[a-z]+)$/,"$1_on$2"));
});
});
</script>
<style type="text/css">
li{
display:inline;
list-style-type:none;
}
img{
border:none;
}
</style>
</head>
<body>
<ul>
<li><a href="#"><img src="image_rollover/jquery.jpg" alt="jQuery" class="rollover" /></a></li><!--
--><li><a href="#"><img src="image_rollover/javascript.jpg" alt="javascript" class="rollover" /></a></li><!--
--><li><a href="#"><img src="image_rollover/css.jpg" alt="CSS" class="rollover" /></a></li><!--
--><li><a href="#"><img src="image_rollover/html.jpg" alt="HTML" class="rollover" /></a></li>
</ul>
</body>
</html>