Array.prototype.contains = function (elem) {
	  var i;
	  for (i = 0; i < this.length; i++) {
		if (this[i] == elem) {
		  return true;
		}
	  }
	
	  return false;
	};
	function Werteliste(querystring) {
	  if(querystring == '') return;
	  var wertestring = unescape(querystring);
	  wertestring = wertestring.slice(1);
	  var paare = wertestring.split("&");
	  for (var i=0; i < paare.length; i++) {
		var name = paare[i].substring(0, paare[i].indexOf("="));
		var wert = paare[i].substring(paare[i].indexOf("=")+1, paare[i].length);
		this[name] = wert;
	  }
	}
	
	
	var urlparams = new Werteliste(window.location.search);