function DisplayMenua(index) {
        for (i=1; i<=2; i++)
        if (index == i) {
        thisMenua = document.getElementById("Menua" + index);
        thisMenua.style.display = "";
        } 
        else {
        otherMenua = document.getElementById("Menua" + i); 
        otherMenua.style.display = "none"; 
        }
}