var b = 0;
function show_teaser(b)
{
    var c=0;
    while(c == 0)
    {
      a = 1 + 3*(Math.random());
      a = Math.round(a);
      if(a != b)
      {
        new Effect.SlideDown('t_'+a, 
        { 
            afterFinish: function() 
            { 
                window.setTimeout(" fade_out("+a+")",4000); 
            } 
        } );  
                
        
        
        c=1;
      }
    }    
}

function fade_out(a)
{
    Effect.Fade('t_'+a, { duration: 0.3 });
    window.setTimeout("show_teaser(a)",1000);
}

function slider_2(f1)
{
   var div = "fly_"+f1;
   
   if(document.getElementById(div).style.display != "none") { new Effect.BlindUp(div);} 
   else {new Effect.BlindDown(div);} 
   
}