var xmlHttp

function showHint(url,tab)
{

xmlHttp=GetXmlHttpObject()
function stateChanged() 
{ 
if (xmlHttp.readyState==4)
{ 
document.getElementById(tab).style.display="";
document.getElementById(tab).innerHTML=xmlHttp.responseText;
}
else if(xmlHttp.readyState==1){
	document.getElementById(tab).innerHTML='<img src="loading.gif">';
}
}

if (xmlHttp==null)
  {
  alert ("Your browser does not support AJAX!");
  return;
  } 

xmlHttp.onreadystatechange=stateChanged;
xmlHttp.open("GET",url,true);
xmlHttp.send(null);

} 



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;
}