// create onEnterFrame function to fade-in the root element (if UI Element is shown up)
function cry_onShow()
{
   _root._alpha = 0;
   onEnterFrame = function()
   {
      if (_root._alpha < 100)
      {
         _root._alpha++;
      }
      else
      {
         // clear onEnterFrame function
         onEnterFrame = function() {};
      }
   }
}

// create onEnterFrame function to fade-out the root element (if requested by UI System)
function cry_requestHide()
{
   onEnterFrame = function()
   {
      if (_root._alpha > 0)
      {
         _root._alpha--;
      }
      else
      {
         // clear onEnterFrame function and notify UI-System that this element does not need to be drawn anymore.
         onEnterFrame = function() {};
         fscommand("cry_hideElement");
      }
   }
}