function show_big_img(winnum,title,width,height,imgurl)
{
im=window.open('','win'+winnum,'top=40,left=40,width='+width+',height='+height+',scrollbars=no,menu=no,status=yes,resizable=no');
im.focus();
im.document.open ("text/html");
im.document.write (''+title+'
');
im.document.close ();
}