更换颜色点击不同的按钮

<link id="cssChange" href="style.css" rel="stylesheet" type="text/css" />

?

function setSkin(n)
?{
??var css = document.getElementById("cssChange");
??var cssList=new Array("yellow.css","red.css","green.css","blue.css","purple.css");
??var cssurl = "";
??cssurl +=cssList[n];
??css.href=cssurl;
?}

<img src="img/blue.gif" width="15" height="15" onclick="setSkin(1对应的值)" />