in common/js/mock/fbinstant.6.2.mock.js [526:537]
getQueryString: function () {
var qd = {};
if (window.location.search) {
window.location.search.substr(1).split('&').forEach(function (item) {
var s = item.split('=');
var k = s[0];
var v = s[1] && decodeURIComponent(s[1]);
(qd[k] = qd[k] || []).push(v);
});
}
return qd;
},