ช่วยด้วยครับผมใช้ settimeout แล้วมีปัญหาอย่างแรงเลยครับ ช่วยด้วยครับใช้ settimeout แล้วสั่งให้ ajax ดึงข้อมูลมาแสดง

	<script language="JavaScript">

	function bodyOnload()
	{
		doCallAjax('CustomerID')
		setTimeout("doLoop();",2000);
	}

	function doLoop()
	{
		bodyOnload();
	}
	</script>

<script src="store/obj.js"></script>
<script language="javascript">

function control(){
	ontime();
	online();
	chatroom();
	setTimeout("control()",2000);
}
function chatroom(){
	if(obj){
		var random=new Date().getTime();
		var url="chatroom.php?random="+random;
		obj.onreadystatechange=function(){
			if(obj.readyState==4){
				document.getElementById("room").innerHTML=obj.responseText;
				scrollbar();
			}
		}
		obj.open("GET",url,false);
		obj.send(null);
	}
}
function scrollbar(){
	document.getElementById("room").scrollTop=document.getElementById("room").scrollHeight;
}
function online(){
	if(obj){
		var random=new Date().getTime();
		var url="online.php?random="+random;
		obj.onreadystatechange=function(){
			if(obj.readyState==4){
				document.getElementById("online").innerHTML=obj.responseText;
			}
		}
		obj.open("GET",url,false);
		obj.send(null);
	}
}
function ontime(){
	if(obj){
		var random=new Date().getTime();
		var url="settime.php?random="+random;
		obj.open("GET",url,false);
		obj.send(null);
	}
}
control();
</script>
<meta charset="windows-874">
<table border="1" width="700" height="480" cellpadding="0" cellspacing="0">
	<tr>
		<td width="500" height="470">
			<div id="room" style="width:500px;height:480px;overflow-x:hidden;overflow-y:scroll;"></div>
		</td>
		<td width="200" valign="top">
			<div id="online"></div>
		</td>
	</tr>
	<tr>
		<td colspan="2" valign="buttom">
			<? include "box.php"; ?>
		</td>
	</tr>
</table>

function control(){
     ontime();
}
function ontime(){
     //ทำงาน
     online();
}
function online(){
     //ทำงาน
     chatroom();
}
function chatroom(){
     //ทำงาน
     setTimeout("control()",2000);
}

control();