<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<link id="css1" rel="stylesheet" type="text/css" href="css1.css" />
<script type="text/javascript">
window.onload=function(){
var a=document.getElementById("a");
var b=document.getElementById("b");
a.onlock=function () {
var c= document.getElementById("css1")
c[href] = "css1.css"
}
b.onclick=function () {
var d = document.getElementById("css1")
d.href = "css2.css"
}
}
</script>
</head>
<body>
<input type="button" name="" id="a" value="红色" />
<input type="button" name="" id="b" value="蓝色"/>
</body>
</html>
潮流229078
Danny_V
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