Parses a query string or location.search into an Object.

parseQueryString.js

/**
* @name - parseQueryString
* @author - Allen Sarkisyan
* @license - Open Source MIT License
*
* @description - Parses a query string into an Object.
* - Optionally can also parse location.search by invoking without an argument
*/
 
function parseQueryString(queryString) {
  var obj = {};
  function sliceUp(x) { x.replace('?', '').split('&').forEach(splitUp); }
  function splitUp(x) { var str = x.split('='); obj[str[0]] = decodeURIComponent(str[1]); }
  try { sliceUp((!queryString ? location.search : queryString)); } catch(e) {}
  return obj;
}