browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
ver = "Old";

if      (browserName == "Netscape" && browserVer >= 3) { ver = "New"; }
else if (browserName == "Microsoft Internet Explorer" && browserVer >= 3) { ver = "New"; }

if (ver == "New")        {

    menu01on = new Image; menu01on.src = "images/icons02b_01.gif";

    menu01off = new Image; menu01off.src = "images/icons02a_01.gif";

}

function img_act(imgName) {
    if (ver == "New") {
        imgOn = eval(imgName + "on.src");
        document [imgName].src = imgOn;
    }
}

function img_inact(imgName) {
    if (ver == "New") {
        imgOff = eval(imgName + "off.src");
        document [imgName].src = imgOff;
    }
}

function LaunchBox( tSite, tFrameName, width, height ) {
    navWindow=window.open( tSite, tFrameName, "scrollbars=yes,status=no,toolbar=no,location=no,menubar=yes,resizable=yes,width="+width+",height="+height+"");
    navWindow.focus();
}