function bemutato() {
	var w = 741;
	var h = 555;
	var aleft = (screen.width) ? (screen.width-w)/2 : 0;
	var atop = (screen.height) ? (screen.height-h)/2 : 0;
	var features = 'width='+w+', height='+h+', toolbar=no, scrollbar=no, statusbar=no, status=no, left='+aleft+', top='+atop;
	nwnd = window.open('bemutato.php', 'bemutato', features);
}