function setScreenStyle()
{
    x = screen.width;
    y = screen.height;
    if (x / y > 2.0) {
        // Probably a dual monitor setup.  Actually, >1.6 would tell.
        x = x / 2;
    }
    s = '../css/main_screen.css.php?x=' + x + '&y=' + y;
    document.write('<link rel="stylesheet" type="text/css" href="' + s + '" />');
}
setScreenStyle();