js获取url参数值

function GetQueryString(name)
{
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i");
var r = window.location.search.substr(1).match(reg);
if (r!=null) return unescape(r[2]); return null;
}
alert(GetQueryString("参数名1"));
alert(GetQueryString("参数名2"));
alert(GetQueryString("参数名3"));

function GetRequest()
{
var url = location.search; //获取url中"?"符后的字串
var theRequest = new Object();
if (url.indexOf("?") != -1)
{
var str = url.substr(1);
strs = str.split("&");
for(var i = 0; i < strs.length; i ++)
{
theRequest[strs[i].split("=")[0]]=unescape(strs[i].split("=")[1]);
}
}
return theRequest;
}
var req = new Object();
req = GetRequest();

参数1 = req["参数1名称"];
参数2 = req["参数2名称"];