function preview(gid, slide)
{
	if (window.screen)
	{
		var hori=screen.availWidth;
		var verti=screen.availHeight;
		window.open('gallery_big.php?gid=' + gid + '&slide=' + slide,'big_win', 'width='+hori+',height='+verti+',fullscreen=1, scrollbars=0,left='+(0)+',top='+(0));
	}
}