/* find time spent on a page */
     function person_out(start) 
     {
             //  alert("start="+start);
            var pag = new String(location.pathname);      
            var myArr = pag.split("/");
            var dim = myArr.length;  
            var page = myArr[dim-1];
            
            if(page == '') //empty 
               {
            //   alert("empty");
                  final_page = "index.php";
               }
            else //not empty
              {
           //   alert("not empty  = "+page);
              final_page = page;
              } 
  //  alert("pag = "+pag+ ", arr = "+myArr+" , dim arr = "+dim+", pagina = "+page);

           exit=new Date();
           time_dif=(exit.getTime()-start.getTime())/1000;
           time_dif=Math.round(time_dif);
 //alert("enter = "+start+" , exit= "+exit); 
          document.images.visitor_cnt.src='lulu.php?time=' + time_dif + '&pag='+final_page;
       //   alert(document.images.visitor_cnt.src);
     }
/* find time spent on a page */