// JavaScript Document

function MM_reloadPage(init) {  //reloads the window if Nav4 resized
  if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
    document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
  else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true);

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 MM_showHideLayers() { //v6.0
  var i,p,v,obj,args=MM_showHideLayers.arguments;
  for (i=0; i<(args.length-2); i+=3) if ((obj=MM_findObj(args[i]))!=null) { v=args[i+2];
    if (obj.style) { obj=obj.style; v=(v=='show')?'visible':(v=='hide')?'hidden':v; }
    obj.visibility=v; }
}

function MM_preloadImages() { //v3.0
  var d=document; if(d.images){ if(!d.MM_p) d.MM_p=new Array();
    var i,j=d.MM_p.length,a=MM_preloadImages.arguments; for(i=0; i<a.length; i++)
    if (a[i].indexOf("#")!=0){ d.MM_p[j]=new Image; d.MM_p[j++].src=a[i];}}
}

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_swapImage() { //v3.0
  var i,j=0,x,a=MM_swapImage.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];}
}

//selfhtml80/navigation/faq.htm#fenster_vordergrund 
function BackToFront() {
  self.focus();
  window.setTimeout("BackToFront()",100);
}

function showMM () {
  if (document.getElementById)
    document.getElementById("MM").style.display="inline";
}
function hideMM () {
  if (document.getElementById)
    document.getElementById("MM").style.display="none";
}

function showMENUE () {
  if (document.getElementById)
    document.getElementById("T").style.display="block";
    document.getElementById("MENUEON").style.display="none";
    document.getElementById("MENUE").style.display="inline";
   /*  
    document.getElementById("ZERO").style.display="inline";
		document.getElementById("MENUE").style.visibility="visible"; */
}
function hideMENUE () {
  if (document.getElementById)
    document.getElementById("MENUE").style.display="none";
	  document.getElementById("MENUEON").style.display="block";
    /* document.getElementById("MENUE").style.visibility="hidden";*/
}
function showC01 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="visible";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC02 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="visible";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC03 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="visible";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC04 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="visible";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC05 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="visible";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC06 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="visible";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC07 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="visible";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC08 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="visible";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC09 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="visible";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC10 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="visible";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC11 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="visible";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC12 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="visible";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC13 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="visible";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC14 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="visible";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC15 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="visible";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC16 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="visible";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC17 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="visible";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC18 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="visible";
    document.getElementById("C-19").style.visibility="hidden";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC19 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
    document.getElementById("C-12").style.visibility="hidden";
    document.getElementById("C-13").style.visibility="hidden";
    document.getElementById("C-14").style.visibility="hidden";
    document.getElementById("C-15").style.visibility="hidden";
    document.getElementById("C-16").style.visibility="hidden";
    document.getElementById("C-17").style.visibility="hidden";
    document.getElementById("C-18").style.visibility="hidden";
    document.getElementById("C-19").style.visibility="visible";
    document.getElementById("C-20").style.visibility="hidden";
}
function showC20 () {
  if (document.getElementById)
    document.getElementById("C-1").style.visibility="hidden";
    document.getElementById("C-2").style.visibility="hidden";
    document.getElementById("C-3").style.visibility="hidden";
    document.getElementById("C-4").style.visibility="hidden";
    document.getElementById("C-5").style.visibility="hidden";
    document.getElementById("C-6").style.visibility="hidden";
    document.getElementById("C-7").style.visibility="hidden";
    document.getElementById("C-8").style.visibility="hidden";
    document.getElementById("C-9").style.visibility="hidden";
    document.getElementById("C-10").style.visibility="hidden";
    document.getElementById("C-11").style.visibility="hidden";
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