function popupPicture(id) {
	
	x = 900;
	y = 700;
	
	x1=((screen.availWidth/2)-(x/2)); 
	y1=((screen.availHeight/2)-(y/2)) - 100;
	
	window.open('popupPicture.php?id='+id,'Obrazek','toolbar=0,location=0,status=0,menubar=0,scrollbars=yes,resizable=yes,left='+x1+',top='+y1+',width='+x+',height='+y+'');
}