Automagic querystring params in js

params.js

window.params = (function() {
  var obj     = {},
      pattern = new RegExp( '([^?=&]+)=?([^&]*)?','g' );

  while ( match = pattern.exec( window.location.search ) ) {
    obj[match[1]] = match[2] ? match[2] : true;
  }

  return obj;
})();