var xmlHttp;

// Ajax
function ajaxCall(page, qstring, endfunc)
{
    getXmlHttpObject();
    if (xmlHttp == null)
        return false;
        
    xmlHttp.onreadystatechange = endfunc;

    xmlHttp.open("GET",page + '?' + qstring + "&sid="+Math.random(), true);
    xmlHttp.send(null);
}

function getXmlHttpObject()
{
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 null;
      }
    }
  }
}