JQ截取URL链接

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;
}

例：https://i-beta.cnblogs.com/posts/edit？a=1&b=2
var data_a = getQueryString("a");
var data_b = getQueryString("b");