var xmlhttp;
var box;
function stateChanged(){ 
	if(xmlhttp.responseText=="no"){
		location.href='login.php';
	}
	if (xmlhttp.readyState==4){ 
		document.getElementById(box).innerHTML=xmlhttp.responseText;
	}
}
function GetXmlHttpObject(){
	if (window.XMLHttpRequest){
		// code for IE7+, Firefox, Chrome, Opera, Safari
		return new XMLHttpRequest();
	}
	if (window.ActiveXObject){
		//code for IE6, IE5
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	return null;
}