获取url中传递的参数值

$().ready(function(){
var url = "http://zhidao.baidu.com/link?url=dYuZUoUbaHiLI&zz=dddd";
var getParam = getvl("zz",url);
alert(getParam);  //dddd
});
function getvl(name,url) {
　　var reg = new RegExp("(^|\\?|&)"+ name +"=([^&]*)(\\s|&|$)", "i");
　　if (reg.test(url))
　　return unescape(RegExp.$2.replace(/\+/g, " "));
　　return "";
}