js 获取url 参数

$(function () {
var WeixinCode = GetQueryString("WeixinCode");
$("#ProXQ").attr('href', '/Procla/Procla/Index?code='+ WeixinCode+'');
})
function GetQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if (r != null) return unescape(r[2]); return null;
}