function swap(img_id, link_id, upload_url, thumb_img, medium_img, large_img){
	$(img_id).src = upload_url + medium_img;
	if($(link_id)) {
		$(link_id).href = upload_url + large_img;
		$(link_id).onclick = function() {
			window.open(upload_url + large_img,'',
			'scrollbars=no,menubar=no,height=600,width=600,resizable=yes,toolbar=no,location=no,status=no');
			return false;
		};
	}
}