function showModalPopup(popupBehavior) 
{
    var modalPopupBehavior = $find(popupBehavior);  
    modalPopupBehavior.show();
}
        
function hideModalPopup(popupBehavior) 
{
    var modalPopupBehavior = $find(popupBehavior);  
    modalPopupBehavior.hide();
}