switchjs.js
// JavaScript Document
function changestyle(i,cssfile)
{
var linkobj=document.getElementsByTagName("link");
linkobj[i].setAttribute("href","css/"+cssfile);
createCookie("defaultcss",cssfile,7);
}
function createCookie(name,value,days)
{
if (days)
{
var date = new Date();
date.setTime(date.getTime()+(days*24*60*60*1000));
var expires = "; expires="+date.toGMTString();
}
else var expires = "";
document.cookie = name+"="+value+expires+"; path=/";
}
function readCookie(name)
{
var nameEQ = name + "=";
var ca = document.cookie.split(;);
for(var i=0;i < ca.length;i++)
{
var c = ca[i];
while (c.charAt(0)== ) c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
var csscookie=readCookie("defaultcss");
if(csscookie) changestyle(0,csscookie);
**********************************
html文件：
<!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>Untitled Document</title>
<link href="css/style1.css" rel="stylesheet" type="text/css" />
<script language="javascript" src="switchjs.js"></script>
</head>
<body>
<div align="center">
<p><a href="#" onclick="changestyle(0,style1.css);return false;">样式一</a> <a href="#" onclick="changestyle(0,style2.css);return false;">样式二</a> <a href="#" onclick="changestyle(0,style3.css);return false;">样式三</a> </p>
<p>换肤选择：
<label>
<select name="selectstyle" id="selectstyle" onchange="changestyle(0,this.value)">
<option value="style1.css">样式一</option>
<option value="style2.css">样式二</option>
<option value="style3.css">样式三</option>
</select>
</label>
<br />
<br />
<br />
</p>
</div>
<table width="278" height="156" border="0" align="center" cellpadding="0" cellspacing="0" class="tablestyle">
<tr>
<td width="98" align="center">用户名：</td>
<td width="180" align="left"><label>
<input type="text" name="username" id="username" />
</label></td>
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