var xmlHttp

function LogOff() { 
	xmlHttp=GetXmlHttpObject();
	if (xmlHttp==null) {
 		var ajax=0;
 	} 
	else {
		var ajax=1;
	}
	var url="engine/AjaxFunc.php";
	url=url+"?functie=LogOff";
	url=url+"&ajax="+ajax;
	xmlHttp.onreadystatechange=stateChanged ;
	xmlHttp.open("GET",url,true);
	xmlHttp.send(null);
}

function stateChanged() { 
	if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete") { 
 		if(xmlHttp.responseText == 'READY'){
			top.document.location.href = 'index.php';
		}
		else if(xmlHttp.responseText == 'FALSE'){
			alert("Kan niet uitloggen");
		}
		else {
			alert(xmlHttp.responseText);
		}
 	} 
}

function GetXmlHttpObject() {
	var xmlHttp=null;
	try {
 		// Firefox, Opera 8.0+, Safari
 		xmlHttp=new XMLHttpRequest();
 	}
	catch (e) {
 		//Internet Explorer
 		try {
  			xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");
  		}
 		catch (e) {
  			xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
  		}
 	}
	return xmlHttp;
}