// JavaScript Document
function refresh_session()
{
location.reload(true);
}

function refresh_session_ajax()
  {
    //alert ("Welcome");
  var xmlHttp;

  try
    {
    // Firefox, Opera 8.0+, Safari
    xmlHttp=new XMLHttpRequest();
    }
  catch (e)
    {
    // Internet Explorer
    try
      {
      xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
      }
    catch (e)
      {
      try
        {
        xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
        }
      catch (e)
        {
        alert("Your browser does not support AJAX!");
        return false;
        }
      }
    }

    xmlHttp.onreadystatechange=function()
      {
      if(xmlHttp.readyState==4)
        {
        //alert(xmlHttp.responseText);
         // do nothing
        }
      }

    xmlHttp.open("GET","session.php",true);
    xmlHttp.send(null);
    
  }