/**
 * 
 * @project:		www.abt.com 
 * 
 * @description:    custom functions
 *  
 * @author:         Goran Stefanovic <goran.stefanovic@marit.ag>
 * @version:        1.0
 * 
 */
 
 
$(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;
			}
		});



});