function menu_ein () {
  if (NS4) {
    getElement("id", "Nav").visibility = "show";
  } else {
    getElement("id", "Nav").style.visibility = "visible";
  }
}

function menu_aus () {
  if (NS4) {
    getElement("id", "Nav").visibility = "hide";
  } else {
    getElement("id", "Nav").style.visibility = "hidden";
  }
}



 	function roll(num) { document.getElementById(num).className="da"; }
 	function unroll(num) { document.getElementById(num).className="weg"; }
	
	
	function MM_swapImgRestore() { //v3.0
  var i,x,a=document.MM_sr; for(i=0;a&&i<a.length&&(x=a[i])&&x.oSrc;i++) x.src=x.oSrc;
}

function MM_findObj(n, d) { //v4.01
  var p,i,x;  if(!d) d=document; if((p=n.indexOf("?"))>0&&parent.frames.length) {
    d=parent.frames[n.substring(p+1)].document; n=n.substring(0,p);}
  if(!(x=d[n])&&d.all) x=d.all[n]; for (i=0;!x&&i<d.forms.length;i++) x=d.forms[i][n];
  for(i=0;!x&&d.layers&&i<d.layers.length;i++) x=MM_findObj(n,d.layers[i].document);
  if(!x && d.getElementById) x=d.getElementById(n); return x;
}

function bildtausch() { //v3.0
  var i,j=0,x,a=bildtausch.arguments; document.MM_sr=new Array; for(i=0;i<(a.length-2);i+=3)
   if ((x=MM_findObj(a[i]))!=null){document.MM_sr[j++]=x; if(!x.oSrc) x.oSrc=x.src; x.src=a[i+2];}
}