function settop(url)
{
  parent.frames["oben"].location.href = url;
}
function setright(url)
{
  parent.frames["mitte"].location.href = url;
}

var hdflag = 0;

function hds(men)
{
  hide("ta"+men);
  show("tb"+men);
  if(hdflag != 0)
  {
    hide("tb"+hdflag);
    show("ta"+hdflag);
  }
  hdflag = men;
}

function checkhd()
{
  locsearch = window.location.search;
  if(locsearch.indexOf("x") != -1)
  {
    locsearch2 = locsearch.substr(5,2);
  }
  else
  {
    locsearch2 = locsearch.substr(5,1);
  }
  hds(locsearch2);
}