function moveDown( elid, start, end )
  {
  	var changeheight = new Fx.Style( elid, 'top', {duration: 400}  );
	changeheight.start( start, end );	
  }
  
  function moveUp( elid, start, end )
  {
  	var changeheight = new Fx.Style( elid, 'top', {duration: 400}  );
	changeheight.start( start, end );
  }
  
  function toggleControl( elid, start, end )
  {
	var styles = $( elid ).getStyles( 'overflow','height', 'top', 'display' );
	var test = '-100px';
	if( start != null )
		test = start.toString()+'px';
	if( styles.top == test )
	{
		moveDown( elid, start, end );
	}	
	else
	{
		moveUp( elid, end, start );
	}
  }