function sizenav()
  {
  if(!document.getElementById)
    return;

  nav=window.document.getElementById("nav1");
  mn=window.document.getElementById("main");

  head=getHead();

  if(mn.offsetHeight) // Moz, IE, OP7 ...
    {
    h=head+mn.offsetHeight;

    if(h>nav.offsetHeight)
      nav.style.height=h+"px";
    }

  if(mn.style && mn.style.pixelHeight) // OP6
    {
    h=head+mn.style.pixelHeight;

    if(h>nav.style.pixelHeight)
      nav.style.pixelHeight=h;
    }
  }

function getHead()
  {
  h1=window.document.getElementById("head1");
  h2=window.document.getElementById("head2");

  if(h1.style && h1.style.pixelHeight)
    return h1.style.pixelHeight+h2.style.pixelHeight;
  if(h1.offsetHeight)
    return h1.offsetHeight+h2.offsetHeight;

  return 80;
  }

function sizeframe()
  {
  if(document.getElementById)
    {
    h=hoehe();

    head=getHead();

    h=h-head-40;

    f=window.document.getElementById("f1");

    f.height=h;
    }
  }


function hoehe()
  {
  var h=600;

  if(document.body)
    {
    if(document.body.clientWidth)
      h=document.body.clientHeight;
    else
      h=window.innerHeight;
    }
  else if(document.documentElement)
    {
    h=document.documentElement.clientHeight;
    }
  else
    {
    h=window.innerHeight;
    }

  return h;
  }