function videoan(){
document.getElementById('flaechemitte2').style.visibility = "hidden";
document.getElementById('flaechemitte').style.visibility = "visible";
}


function pressean(){
document.getElementById('flaechemitte2').style.visibility = "visible";
document.getElementById('flaechemitte').style.visibility = "hidden";
}

var einaus =2;
function schalter() {

     if(einaus==1) {
     window.document.getElementById('artikel').style.visibility = "visible";
     einaus=2;
      window.document.getElementById('texteinaus').innerHTML = "Text ausblenden";
     }
     else {
      window.document.getElementById('artikel').style.visibility = "hidden";
     einaus=1;
     window.document.getElementById('texteinaus').innerHTML = "Text einblenden";
     }
//alert(einaus);
   }