// JavaScript Document
var xmlHttp

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

function adChanged() 
{ 
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
 { 
 document.getElementById("addHolder").innerHTML=xmlHttp.responseText; 
 } 
}

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;
}