access querystring params from javascript

QueryString.js

// adapted from: http://stackoverflow.com/questions/901115/get-query-string-values-in-javascript
// wrapped it in a module and only exposing a getter function make the datastructure immutable

// usage: var bla = QueryString.get('loginEnabled')
var QueryString = (function () {
  var urlParams = {};
    var e,
        a = /\+/g,  // Regex for replacing addition symbol with a space
        r = /([^&=]+)=?([^&]*)/g,
        d = function (s) { return decodeURIComponent(s.replace(a, " ")); },
        q = window.location.search.substring(1);

    while (e = r.exec(q))
       urlParams[d(e[1])] = d(e[2]);

    
    function get(key) {
      return urlParams[key];
    }

    return {
      get: get
    }
})();

thx! :-)