function hiddeIntro(){
  if(el = document.getElementById('startImage')) el.style.display = "none";
}

function intro(){ 
  if(el = document.getElementById('webseite')) el.style.display = "block";
  if(el = document.getElementById('screenImage')) el.style.display = "block";
  if(el = document.getElementById('news')) el.style.display = "block";
  
  if(document.getElementById('startImage'))  new Effect.Opacity( 'startImage', {duration:10, from:1.0, to:0.0, afterFinish:hiddeIntro} );
  // new Effect.Opacity( 'webseite', {duration:1.0, from:0.0, to:1.0} );
  // new Effect.Opacity( 'screenImage', {duration:1.0, from:0.0, to:1.0} );
  // new Effect.Opacity( 'newsout', {duration:1.0, from:0.0, to:1.0} );
}