js方法获取get方式传过来的参数

有两种方法：比如url为：http://h5.49you.com/reg.html?sid=1&a=2&b=3&c=4

1、function GetQueryString(name) {

var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)","i");

var r = window.location.search.substr(1).match(reg);

if (r!=null) return (r[2]); return null;

}

var sid = GetQueryString("sid");

var a = GetQueryString("a");

var b = GetQueryString("b");

var c = GetQueryString("c");

2、var $_GET = (function() {

var url = window.document.location.href.toString();

var u = url.split("?");

if (typeof(u[1]) == "string") {

u = u[1].split("&");

var get = {};

for (var i in u) {

var j = u[i].split("=");

get[j[0]] = j[1];

}

return get;

} else {

return {};

}

})();

var sid=ad = $_GET[‘sid‘];

var a=ad = $_GET[‘a‘];

var b=ad = $_GET[‘b‘];

var c=ad = $_GET[‘c‘];