function SwitchElementVisibility(elementID) {
    var element = document.getElementById(elementID);
        if (element.style.display == 'block')
            element.style.display = 'none';
        else
            element.style.display = 'block';
}

function HideElement(elementID) {
    var element = document.getElementById(elementID);
    if (element != null)
        element.style.display = 'none';
}

function ShowElement(elementID) {
    var element = document.getElementById(elementID);
    if (element != null)
        element.style.display = 'block';
}

function SubmitForm(formID) {
    var form = document.getElementById(formID);
    form.submit();
}