<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
#ulColor li{
width: 100%; height: 20px;
}
</style>
<script src="http://code.jquery.com/jquery-latest.js"></script>
<script type="text/javascript">
$(function(){
var lihtml="<li></li>";
var ulC=$('#ulColor');
var liC=['red','blue','green','#ccc'];
for(var i=0; i<20; i++){
lihtml.length=i;
ulC.append(lihtml);
}
var liall=$('#ulColor li');
var lLen=liall.length;
for(var j=0;j<lLen;j++){
var liColor=liC[j%liC.length];
liall.eq(j).css('background-color',liColor);
}
})
</script>
</head>
<body>
<ul id="ulColor"></ul>
</html>