querystrings.js

var query = "http://goatslacker.com/?query";

function split() {
  var queryString = {};
  query.split("?").pop().split("&").forEach(function (prop) {
    var item = prop.split("=");
    queryString[item.shift()] = item.shift();
  });
  return queryString;
}

function regex() {
  var queryString = {};

  query.replace(/([^?=&]+)(=([^&]*))?/g, function ($0, $1, $2, $3) {
    queryString[$1] = $3;
  });

  return queryString;
}

console.log(regex());
console.log(split());