function windowHeight() {
	var de = document.documentElement;
	return self.innerHeight || ( de && de.clientHeight ) || (document.body && document.body.clientHeight) || 0;
}

function windowWidth() {
	var de = document.documentElement;
	return self.innerWidth || ( de && de.clientWidth ) || (document.body && document.body.clientWidth) || 0;
}

var st_rev = '';
if(windowHeight() < 50 || windowWidth() < 50 || window.top != window) {
	var image = new Image();
	image.src = '/screen.php?' + 
		encodeURIComponent(
			window.location.href + ' '
			+ (document.referrer ? document.referrer : '-') + ' '
			+ (window.top != window ? 'frame' :  '-') + ' '
			+ navigator.userAgent
		);
	st_rev = 'rc' + Math.round(Math.random(1000)*1000);
}