function mediapop(url,name,w,h) {
	var winl = (screen.availWidth - w) / 2;
    var wint = (screen.availHeight - h) / 2;
	winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl+',scrollbars=yes,resizable=no';
	window.open(url, name, winprops);
};