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 "";
		}