用URL传递参数
实例：
Code//blue.css
body {background-color: #A7C7E0}
Code//red.css
body {background-color: #FFCEBB}
Code//white.css
body {background-color: white}
Code//default.css
body {background-color: #F0FFF0}
Code//1.html
<!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>
<title>1</title>
<script type="text/javascript">
var search = document.location.search;
if (!search && search.length == 0) search = "default";
else search = search.substring(1,search.length);
var style = "<link href='" + search + ".css' rel='stylesheet'>";
document.write(style);
</script>
</head>
<body>
<div><a href="1.html">默认</a></div>
<div><a href="1.html?blue">蓝色</a></div>
<div><a href="1.html?red">红色</a></div>
<div><a href="1.html?white">白色</a></div>
</body>
</html>
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