var NET2 = (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 4);
    var invis = (NET2) ? 'hide' : 'hidden';
    var vis = (NET2) ? 'show' : 'visible';
    var im12 = (NET2) ? document.im12 : document.all.im12.style;
    var im22 = (NET2) ? document.im22 : document.all.im22.style;
    var im32 = (NET2) ? document.im32 : document.all.im32.style;