function enlargeImage(href, target, image_id, w, h)
{
	var image = $(image_id);

	if (!w)
		w = image.width;
	if (!h)
		h = image.height;

	window.open(href, target, 'width=' + (w + 16) + ',height=' + (h + 16) + ',resizable=no,scrollbars=no');
	return false;
}