function isKeyCode(e, keyCode) {
    var kc;
    if (window.event) {
        kc = window.event.keyCode;
    } else {
        kc = e.which;
    }
    if (kc == keyCode) {
        return true;
    } else {
        return false;
    }
}
function isEnter(e) {
    return isKeyCode(e, 13);
}
function isTab(e) {
    return isKeyCode(e, 9);
}