var xmlHttp
var url
function showOnline()
{ 
xmlHttp=GetXmlHttpObject()
if (xmlHttp==null)
 {
 alert ("Browser does not support HTTP Request")
 return
 }
url=urlajm+"?sid="+Math.random();
xmlHttp.onreadystatechange=stateChanged; 
xmlHttp.open("GET",url,true);
xmlHttp.send(null);
}

function stateChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 {
 if(xmlHttp.responseText.substr(0,10)=="response##")
 {
 	document.getElementById("errorMsgAjm").style.display='none';
 	document.getElementById("ajaxonlinediv").innerHTML=xmlHttp.responseText.substr(10); 
 }
 else 
 	document.getElementById("errorMsgAjm").style.display='block';
}
}

function GetXmlHttpObject()
{
var xmlHttp=null;
try
 {
 // Firefox, Opera 8.0+, Safari
 xmlHttp=new XMLHttpRequest();
 }
catch (e)
 {
 //Internet Explorer
 try
  {
  xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  }
 catch (e)
  {
  xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  }
 }
return xmlHttp;
}