var sh = window.screen.height;
var sw = window.screen.width;
var currURL = encodeURIComponent(window.location.href);
var pf = navigator.platform;
var prevURL = encodeURIComponent(document.referrer);

setTimeout(trackVisitor, 10);

function trackVisitor() {
	try {
		var ind_vst = getCookie("ind_vst");
		if (ind_vst == null || ind_vst == "") {
			ind_vst = getRndVal();
			var expDate = new Date();
			expDate.setTime(expDate.getTime() + 10*365*24*60*60*1000);
			document.cookie = "ind_vst="+escape(ind_vst) + ";expires="+expDate.toGMTString() + ";domain=.518ad.com;path=/";
		}
		var url = "http://www.518ad.com:8086/pvstat/logvisit?sh="+sh+"&sw="+sw+"&url="+currURL+"&ref="+prevURL+
				  "&pf="+pf+"&uv="+ind_vst+"&t="+new Date().getTime();
		var script = document.createElement("script");
		script.type = 'text/javascript'
		script.src = url;
		script.async = true;
		var s = document.getElementsByTagName('script')[0];
		s.parentNode.insertBefore(script, s);
	} catch (ex) {
		alert(ex);
	}
}

function getRndVal() {
	var val = parseInt(Math.random()*10000000000) + 5180000000000;
	return val.toString(16);
}

function getCookie(name) {
	var mycookie = unescape(document.cookie);
	var cindex = mycookie.indexOf(name + "=");
	if (cindex != -1) {
	    var cstart = cindex+name.length + 1;
	    var cend = mycookie.indexOf(";", cstart);
	    if (cend == -1) 
	        cend = mycookie.length;
	    return mycookie.substring(cstart, cend);
	}
	return null;
}