function toggleMenu(string_language){
    if (string_language == "cn")
    {
        document.getElementById("divCnMenu").style.display = "";
        document.getElementById("divTwMenu").style.display = "none";
    }
    else if (string_language == "tw")
    {

        document.getElementById("divCnMenu").style.display = "none";
        document.getElementById("divTwMenu").style.display = "";
    }
}