function showModalPopup(s)
{
    var modalPopupBehavior = $find(s);
    if (modalPopupBehavior != null)
        modalPopupBehavior.show();
}

function hideModalPopup(s)
{
    var modalPopupBehavior = $find(s);
    if (modalPopupBehavior != null)
        modalPopupBehavior.hide();
}