var xmlhttp;

function callServer(str)
{
xmlhttp=GetXmlHttpObject();
if (xmlhttp==null)
  {
  alert ("your browser does not support HTTP Request, check out www.firefox.com");
  return;
  }
var url="php2.php";
url=url+"?q="+str;
url=url+"&sid="+Math.random();
xmlhttp.onreadystatechange=stateChanged;
xmlhttp.open("GET",str,true);
xmlhttp.send(null);
}



function stateChanged()
{
if (xmlhttp.readyState==4)
  {
	  processEvent(xmlhttp.responseXML);
  }
}

function GetXmlHttpObject()
{
if (window.XMLHttpRequest)
  {
  return new XMLHttpRequest();
  }
if (window.ActiveXObject)
  {
  return new ActiveXObject("Microsoft.XMLHTTP");
  }
return null;
}