function openImage(url,width,height)
{
	var image_win;
	image_win = window.open('image_viewer.php?f='+url+'','image_win','width='+width+',height='+height+',resizable=1,scrollbars=0,toolbar=0,menubar=0,location=0,status=1,directories=0,dependent=1');
	if (window.focus){
		image_win.focus();
	}
}