 </summary>
function IsOwaPremiumBrowser()
{
    var ua = navigator.userAgent;
    var av = navigator.appVersion;
    var mac = (av.indexOf('Mac') != -1);
    var win = ((av.indexOf('Win') != -1) || (av.indexOf('NT') != -1));

    // If you change the follow browser check logic, change utility.js as well.
    // We have duplicate logic because otherwise logon page must include more code than necessary.
    //
    var ie = (ua.indexOf("MSIE ") != -1);
    var firefox = (ua.indexOf("Firefox/") != -1 && ua.ind