/* Copyright (c) 2006-2007 Mathias Bank (http://www.mathias-bank.de)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) 
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 * 
 * Version 2.1
 * 
 * Thanks to 
 * Hinnerk Ruemenapf - http://hinnerk.ruemenapf.de/ for bug reporting and fixing.
 * Tom Leonard for some improvements
 * 
 * More Updates by Mario 
 * 
 */

jQuery.fn.extend({
	
/*
* Returns get parameters.
*
* If the desired param does not exist, null will be returned
*
* To get the document params:
* @example value = $(document).getUrlParam("paramName");
* 
* To get the params of a html-attribut (uses src attribute)
* @example value = $('#imgLink').getUrlParam("paramName");
*/ 
	
 getUrlParam: function(strParamName){
	  strParamName = escape(unescape(strParamName));
	  var returnVal = new Array();
	  this.each(
			  
			  function()
			  {
				  var strHref =  $(this).attr("src")|| $(this).attr("href")|| this.URL||""; 
				  var qString = "";

				  if ( strHref.search("#|\\?") > -1 ){
				    	var strQueryString = strHref.substr(strHref.search("#|\\?")+1);
				  		qString = strQueryString.split("&");
				  }

				  for (var i=0;i<qString.length; i++){
						if (escape(unescape(qString[i].split("=")[0])) == strParamName){
							returnVal.push(qString[i].split("=")[1]);
						}
				  }
			  }
	  ); 
	 
	  if (returnVal.length==0) return null;
	  else if (returnVal.length==1) return returnVal[0];
	  else return returnVal;
	}
});