var xmlhttp;

function GetXMLHttpObject() {
	if(window.XMLHttpRequest) {
		return new XMLHttpRequest();
	}
	if (window.ActiveXObject) {
		return new ActiveXObject("Microsoft.XMLHTTP");
	}
	return null;
}



function setSource() {
        if(xmlhttp.readyState==4) {
                var i = document.getElementById('adImg');
                var u = document.getElementById('adUrl');

                var id=xmlhttp.responseText;
                i.src="/AdServe/view/i.php?i="+id;
                u.href="/AdServe/view/u.php?i="+id;
                
			if(id == 42) {
			u.target="_self";
			}
				else {
				u.target="_blank";
				}

        }
}


function displayAd() {
	xmlhttp=GetXMLHttpObject();
	var ts = new Date().getTime();
	var p = document.getElementById('AdPosition').value;
	var url = "/AdServe/view/getAd.php?t="+ts+"&p="+p;
	xmlhttp.onreadystatechange=setSource;
	xmlhttp.open("GET",url,true);
	xmlhttp.send(null);
}

displayAd();
setInterval("displayAd()",60000);