function UpdateKat2(KatID, sideElement, kaldMessage) {
     document.getElementById(sideElement).innerHTML = kaldMessage;
     try {
     req = new XMLHttpRequest(); /* f.eks. Firefox */
     } catch(e) {
       try {
       req = new ActiveXObject("Msxml2.XMLHTTP");  /* IE-versioner */
       } catch (e) {
         try {
         req = new ActiveXObject("Microsoft.XMLHTTP");  /* IE-versioner */
         } catch (e) {
          req = false;
         } 
       } 
     }
     req.onreadystatechange = function() {svarUpdateKat2(sideElement);};
     req.open("GET","KategoriValg2.php" + "?KatID2=" + KatID,true);
     req.send(null);
  }
     
  

function svarUpdateKat2(sideElement) {
   var output = '';
   if(req.readyState == 4) {
      if(req.status == 200) {
         output = req.responseText;
         document.getElementById(sideElement).innerHTML = output;
         }
      }
  }