function isAndroid() {
    var isAndroidDevice = false;

    if (navigator.userAgent.toLowerCase().indexOf("android") > -1) {
        isAndroidDevice = true;
    }

    return isAndroidDevice;
}

function isInternetExplorer() {
    var isIE = false;

    if (navigator.appName == "Microsoft Internet Explorer") {
        isIE = true;
    }

    return isIE;
}

function isIPhone() 
{
    var isIphone = false;
    
    if (navigator.userAgent.indexOf('iPhone') != -1) {
        isIphone = true;   
    }
    
    return isIphone;
}

function isIPod() 
{
    var isIpod = false;
    
    if (navigator.userAgent.indexOf('iPod') != -1) {
        isIpod = true;   
    }
    
    return isIpod;
}

function isIPad() 
{
    var isIpad = false;
    
    if (navigator.userAgent.indexOf('iPad') != -1) {
        isIpad = true;   
    }
    
    return isIpad;
}

function isFireFox() {
    var isFF = false;
    
    if (navigator.userAgent.indexOf("Firefox") != -1) {
        isFF = true;
    }

    return isFF;
}