var page = "online.asp";
function ajax(url,target) 
{     
	//native XMLHttpRequest object   
	document.getElementById(target).innerHTML = '';  
	if (window.XMLHttpRequest) {       
		req = new XMLHttpRequest();       
		req.onreadystatechange = function() {ajaxDone(target);};       
		req.open("GET", url, true);       
		req.send(null);  
	//IE/Windows ActiveX version   
	} else if (window.ActiveXObject) {       
		req = new ActiveXObject("Microsoft.XMLHTTP");       
	if (req) {           
		req.onreadystatechange = function() {ajaxDone(target);};           
		req.open("GET", url, true);           
		req.send();       
		}   
	}		   
setTimeout("ajax(page,'scriptoutput')", 20000);
}

function ajaxDone(target) {   
	//only if req is "loaded"   
	if (req.readyState == 4) {       
		//only if "OK"       
		if (req.status == 200 || req.status == 304) {           
			results = req.responseText;           
			document.getElementById(target).innerHTML = results;       
		} else {           
			document.getElementById(target).innerHTML="ajax error:\n" +               
				req.statusText;       
		}   
	}
}