function show(id) {

    window.document.getElementById(id).style.visibility = "visible";
    window.document.getElementById(id).style.display = "block";
 
}

function hide(id) {
    window.document.getElementById(id).style.visibility = "hidden";
    window.document.getElementById(id).style.display = "none";   
}



function menuPos(){
   var gescrollt = (document.all)? document.body.scrollTop : window.pageYOffset;
   var neuPos = gescrollt + 100;

   if (document.layers) // Netscape 4
      document.tbr1.top = neuPos;

   else if (document.all) { // IE

        document.all.tbr1.style.top = neuPos;
        document.all.tbr2.style.top = neuPos;
        document.all.tbr3.style.top = neuPos;
        document.all.tbr4.style.top = neuPos;
        document.all.tbr5.style.top = neuPos;
        document.all.tbr1.style.top = neuPos;
        document.all.tbr6.style.top = neuPos;
        document.all.tbr7.style.top = neuPos;
        document.all.tbr8.style.top = neuPos;
        document.all.tbr9.style.top = neuPos;
        document.all.tbr10.style.top = neuPos;
        document.all.tbr10.style.top = neuPos;
        document.all.tbr12.style.top = neuPos;
        document.all.tbr13.style.top = neuPos;
        document.all.tbr14.style.top = neuPos;

   }

   else if (document.getElementById) // W3C
      document.getElementById("tbr1").style.top = neuPos;
}

function init(tbrid) {
   var tbrid = tbrid;

   // für IE onscroll das Menü neu positionieren:
   if (document.all) document.body.onscroll = menuPos;

   // für W3C-Browser position auf "fixed" stellen:
   else if (document.getElementById)
     document.getElementById(tbrid).style.position="fixed";

   // für Netscape 4 wie gehabt:
   else if (document.layers) setInterval("menuPos(tbrid)",40);
}