function open_popup(url)
{
window.open(url, 'popup', 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=no,copyhistory=no,width=550,height=400' );
}
function checkscreen ()
{
var p;
p = "("+screen.width+" x "+screen.height+") pixels, "+	screen.pixelDepth +" bit depth, "+	screen.colorDepth +" bit palette depth.";
document.cookie = "screen= "   + p +"";
}