Parse url parameters from any string given or from current URL otherwise

parse-url-params.js

// Adapted from http://stackoverflow.com/a/901144/105132

function parseUrlParams(queryString) {
  var params = {},
      match,
      pl     = /\+/g,  // Regex for replacing addition symbol with a space
      search = /([^&=]+)=?([^&]*)/g,
      decode = function (s) { return decodeURIComponent(s.replace(pl, " ")); },
      query  = queryString || window.location.search.substring(1);

  while (match = search.exec(query))
    params[decode(match[1])] = decode(match[2]);
    
  return params;
};