添加CLASS jquery
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title> New Document </title>
<meta name="Generator" content="EditPlus">
<meta name="Author" content="">
<meta name="Keywords" content="">
<meta name="Description" content="">
<script type="text/javascript" src="http://luxury.bjhoutai.com/js/jquery-1.8.2.min.js"></script>
</head>
<style>
*{padding:0px; margin:0px; border:0px; }
.red{background:red}
.blue{background:blue}
.yellow{background:yellow}
li:hover{background:red;}
</style>
<body>
<ul>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
<li>adsfasdfasdfasdfasdf</li>
</ul>
<script>
$(‘ul li‘).each(function(i) {
if(i%2==0){
$(this).addClass(‘blue‘);
}else{
$(this).addClass(‘yellow‘);
}
});
</script>
</body>
</html>
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