<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>test</title>
<style type="text/css">
a {color:#000;}
a.click {color:blue;}
</style>
<script type="text/javascript">
var last='';
function a_click(){
var All=document.getElementsByTagName("a");
for (var i=0,len=All.length;i<len;i++){
All[i].onclick=function(){
if(last){
last.className=null;
}
last=this;
this.className="click";
}
}
}
window.onload=function(){
a_click();
}
</script>
</head>
<body>
<a href="#">A</a><br />
<a href="#">B</a><br />
<a href="#">C</a>
</body>
</html>
