function showPulldown(pulldownName) 
  {
		var win = document.getElementById(pulldownName);
		if (win != null) 
    {
			win.style.visibility = 'visible';
		}
	}

	function hidePulldown(pulldownName) 
  {
		var win = document.getElementById(pulldownName);
		if (win != null) 
    {
			win.style.visibility = 'hidden';
	  }
	}   
  
  function hideAllPulldowns()
  {
    hidePulldown('capa');
    hidePulldown('staff');
    hidePulldown('location');
  }