function ClearForm(element, value) {
    if (element.value == value)
        element.value = "";
}

function PopulateForm(element, value) {
    if (element.value == "")
        element.value = value;
}

function ShowCV2() {
    var dv = document.getElementById("cvv");
    if (dv.style.display == "none")
        dv.style.display = "block";
    else dv.style.display = "none";
}