/* 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 http://www.mathias-bank.de/2007/04/21/jquery-plugin-geturlparam-version-2/
 * 
 * Thanks to 
 * Hinnerk Ruemenapf - http://hinnerk.ruemenapf.de/ for bug reporting and fixing.
 * Tom Leonard for some improvements
 * 
 */
 
jQuery.noConflict(); //http://docs.jquery.com/Using_jQuery_with_Other_Libraries
//$(document).ready(function(){
jQuery(document).ready(function($){
 
	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();
		  var qString = null;
		  
		  if ($(this).attr("nodeName")=="#document") {
			//document-handler
			
			if (window.location.search.search(strParamName) > -1 ){
				
				qString = window.location.search.substr(1,window.location.search.length).split("&");
			}
				
		  } else if ($(this).attr("src")!="undefined") {
			
			var strHref = $(this).attr("src")
			if ( strHref.indexOf("?") > -1 ){
				var strQueryString = strHref.substr(strHref.indexOf("?")+1);
				qString = strQueryString.split("&");
			}
		  } else if ($(this).attr("href")!="undefined") {
			
			var strHref = $(this).attr("href")
			if ( strHref.indexOf("?") > -1 ){
				var strQueryString = strHref.substr(strHref.indexOf("?")+1);
				qString = strQueryString.split("&");
			}
		  } else {
			return null;
		  }
			
		  
		  if (qString==null) return null;
		  
		  
		  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;
		}
	});
	
});