var wb = null;

function popup(site,w,h){
	if (window.screen) {
		var hori = screen.availWidth;
		var verti = screen.availHeight;
		wb=window.open(site,'Inhalt','resizable=1,scrollbars=1,width=' + w + ',height=' + h + ',left=' + ((hori - w - 10) * .5) + ',top=' + ((verti - h - 30) * .5));
	}
}