function ChangeFrUrl()
{
  switch(document.naviform.navi.selectedIndex)
  {
    case 0: window.location.href="../home.htm";
    break;
    case 1: window.location.href="index.html";
    break;
    case 2: window.location.href="talk.htm";
    break;
    case 3: window.location.href="liapu.htm";
    break;
    case 4: window.location.href="lmayer.htm";
    break;
    case 5: window.location.href="lmayer2.htm";
    break;
    case 6: window.location.href="ifs.htm";
    break;
    case 7: window.location.href="figwin.htm";
    break;
    case 8: window.location.href="frieze.htm";
    break;
    case 9: window.location.href="wallpaper.htm";
    break;
    case 10: window.location.href="frlake.htm";
    break;
    case 11: window.location.href="simpiter.htm";
    break;
    case 12: window.location.href="simpiter2.htm";
    break;
    case 13: window.location.href="sierp.htm";
    break;
    case 14: window.location.href="astfrak.htm";
    break;
    case 15: window.location.href="plantagen.htm";
    break;
    case 16: window.location.href="hyperbolic.htm";
    break;
    case 17: window.location.href="fractype.htm";
    break;
    case 18: window.location.href="../fracgal/index.html";
    break;
    case 19: window.location.href="../extra/extramain.htm";
    break; 
    case 20: window.location.href="frlinks.htm";
    break;
  }
}

function gChangeFrUrl()
{
  switch(document.naviform.navi.selectedIndex)
  {
    case 0: window.location.href="../home.htm";
    break;
    case 1: window.location.href="index-g.html";
    break;
    case 2: window.location.href="talk-g.htm";
    break;
    case 3: window.location.href="liapu-g.htm";
    break;
    case 4: window.location.href="lmayer-g.htm";
    break;
    case 5: window.location.href="lmayer2-g.htm";
    break;
    case 6: window.location.href="ifs-g.htm";
    break;
    case 7: window.location.href="figwin-g.htm";
    break;
    case 8: window.location.href="frieze-g.htm";
    break;
    case 9: window.location.href="wallpaper-g.htm";
    break;
    case 10: window.location.href="frlake-g.htm";
    break;
    case 11: window.location.href="simpiter-g.htm";
    break;
    case 12: window.location.href="simpiter2-g.htm";
    break;
    case 13: window.location.href="sierp-g.htm";
    break;
    case 14: window.location.href="astfrak-g.htm";
    break;
    case 15: window.location.href="plantagen-g.htm";
    break;
    case 16: window.location.href="hyperbolic-g.htm";
    break;
    case 17: window.location.href="fractype-g.htm";
    break;
    case 18: window.location.href="../fracgal/index.html";
    break;
    case 19: window.location.href="../extra/extramain.htm";
    break;
    case 20: window.location.href="frlinks.htm";
    break;
  }
}

function newpic(name)
{
  window.location.href="#images";
  document.bigpic.src = name;
}