AJAX Suggestions... Some Event dont work..

hello again,

got a problem with my ajax scripts... some of them doesnt work on IE browsers..
ie,

var xmlHttp // variable for the request

var c=0
var t
function timedCount()
{
	document.getElementById('txt').value=c
	c=c+1
	t=setTimeout("timedCount()",1000)
}

function ajaxFunction()
{
	xmlHttp = GetXmlHttpObject() // set the xmlHttp first
	
	if(xmlHttp == null)
	{
		alert("Your Browser Doesnt Support AJAX.!");	
	}
	else if(xmlHttp != null)
	{		
		var c=0
		var t
		//alert("Browser Supported "+url);
		//document.getElementById('txt').value=c
		var url = "status.php"
		xmlHttp.onreadystatechange=stateChanged // pre-defined function 
		xmlHttp.open("GET",url,true)
		xmlHttp.send(null)

		t=setTimeout("ajaxFunction()",1000)
	}
}
	
		function stateChanged() 
		{ 
			if (xmlHttp.readyState==4)
			{ 
				document.getElementById("ajax").innerHTML=xmlHttp.responseText
			} 
		}

	function GetXmlHttpObject()
	{ 
		var objXMLHttp=null
		if (window.XMLHttpRequest)
		{
			objXMLHttp=new XMLHttpRequest()
		}
		else if (window.ActiveXObject)
		{
			objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
		}
		return objXMLHttp
	}
	

PHP:

simple ajax, all parts work on Internet Explorer and FF.. but setTimeout doesnt work in IE.. This line refreshes the script every second.. works fine in FF.

Thanks in Advance.