// clear default value from a field when clicked
function clearField(id,defaultVar) {
    if (id.value == defaultVar) {
        id.value = "";
    }
}
function ClearField(id,defaultVar) {
    if (id.value == defaultVar) {
        id.value = "";
    }
}

// reset a field to the default value
function resetField(id, defaultVar) {
    if (id.value == "") {
        id.value = defaultVar;
    }
}
function ResetField(id, defaultVar) {
    if (id.value == "") {
        id.value = defaultVar;
    }
}

function HideById(elementId){
    var tmpItem = document.getElementById(elementId)
    
    tmpItem.style.display = "none";
    tmpItem.style.visibility = 'hidden';
}
function ShowById(elementId){
    var tmpItem = document.getElementById(elementId)
    
    tmpItem.style.display = "block";
    tmpItem.style.visibility = 'visible';
}

function HideThis(element){
    element.style.display = 'none';
    element.style.visibility = 'hidden';
}
function ShowThis(element){
    element.style.display = 'block';
    element.style.visibility = 'visible';
}

function ControlSwap(showCtrl, hideCtrl){
    document.getElementById(showCtrl).style.display = "block";
    hideCtrl.style.display = "none";
}