function BigPicture(pic_url, titlename, h, w)
{
	zoomed_in = window.open('',"bigpicture",'toolbar=0,resizable=1,width=' + w + ',height=' + h);
				
	with(zoomed_in.document)
	{
		write('<title>' + titlename + '</title>');
		write('<table width=100% height=100%><td align=center valign=center>');
		write('<img src = "' + escape(pic_url) + '">');
		write('</td></table>');
		close();
	}
}