var ajax = true;
function makeRequest(){
	
if(window.XMLHttpRequest){
return new XMLHttpRequest();
} else if(window.ActiveXObject){
return new ActiveXObject("Microsoft.XMLHTTP");
} else {
err("Tarayıcınız Destek Vermiyor.");
}
}
var req = makeRequest();

function recieve(){
	if(ajax==false){
		return false;
	}
req.open("GET", "istek.php");
req.setRequestHeader('Content-type', 'text/html; charset=iso-8859-9');
req.onreadystatechange = handleResp;
req.send(null);
}

function durumdegistir(durum){
	req.open("GET", "durumdegistir.php?durum=" + durum);
	req.setRequestHeader('Content-type', 'text/html; charset=iso-8859-9');
	req.send(null);
}

function handleResp(){
	if(req.readyState == 4 && req.status == 200){
		if(req.responseText==1) {
			ajax=true;
			a1=document.getElementById('showimage').style;
			if(a1.display != 'inline') {
				var obj_iframe = document.getElementById('chatframe');
				obj_iframe.src='chatdavet.php';
				a1.display='inline';
			}
		}else{
			if(req.responseText==5){
				ajax=false;
			}
		}
	}
}

function aaa(){
	setTimeout('aaa()', 8000);
	recieve();
}
window.onload = aaa;