function setTeaser(wert) {
  var teaserInhalte =  new Array();
 
  document.getElementById('teaser_unten').innerHTML = teaserInhalte[wert];
  
  if (window.XMLHttpRequest) {
    http_request = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    http_request = new ActiveXObject("Microsoft.XMLHTTP");
  }
  
  http_request.open('GET', 'http://www.rotronic.ch/set_teaser_id.php?teaser_id=' + wert, true);
  http_request.send();   
  
  
}

function closeTeaser(wert) {
   var teaserInhalte = '';
 
  document.getElementById('teaser_unten').innerHTML = teaserInhalte;
  
  if (window.XMLHttpRequest) {
    http_request = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    http_request = new ActiveXObject("Microsoft.XMLHTTP");
  }
  
  http_request.open('GET', 'http://www.rotronic.ch/set_teaser_id.php?teaser_id=' + wert, true);
  http_request.send();
  
}