window.addEvent("domready",function()
  {
    $('close_popup').addEvent('click',function(e){
      if (e)e = new Event(e);
      e.stop();
      $('popup_mdp').setStyle('visibility','hidden');

    });
	
    $('open_popup').addEvent('click',function(e){
      if (e)e = new Event(e);
      e.stop();
      $('popup_mdp').setStyle('visibility','visible');
    });
	
    var iHeightForm = $('login_amb').getCoordinates();
    var iBegin = iHeightForm.top;
      $('bg_login_amb').setStyle('top', iBegin)
	
  });