function photo(url,w,h) 
{
	var int_windowLeft = (screen.width - w) / 2;
	var int_windowTop = (screen.height - h) / 2;
	mywin = window.open(url,'galleria'+w+h,'toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=' + w + ',height=' + h + ',top=' + int_windowTop + ',left=' + int_windowLeft + '');
}