function hiddenText(iid, value, classname) {
    document.getElementById(iid).value = value;
    document.getElementById(iid).className = classname;
}

function displayText(iid, value, classname) {
    if (document.getElementById(iid).value == "") {
        document.getElementById(iid).value = value;
        document.getElementById(iid).className = classname;
    }
}

function clickButton(e, buttonid) {
    var evt = e ? e : window.event;
    var bt = document.getElementById(buttonid);
    if (bt) {
        if (evt.keyCode == 13) {
            bt.click();
            return false;
        }
    }
}