function chgLang(){
  newLoc = document.location.href;
  if(newLoc.indexOf('.html')==-1)newLoc = "index_de.html";
  if(newLoc.indexOf('_en')==-1){ newLoc = newLoc.replace(/_de/,"_en");} // von de --> en
  else if(newLoc.indexOf('_de')==-1){ newLoc = newLoc.replace(/_en/,"_de");} // von en --> de
  document.location.href = newLoc;
}

function findObj(n, d) { //v4.0
  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=findObj(n,d.layers[i].document);
  if(!x && document.getElementById) x=document.getElementById(n); return x;
}

function showHideDisplay() { //v3.0
  var i,p,v,obj,args=showHideDisplay.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'block':(v='hide')?'none':v; }
    obj.display=v; }
}