function showDownloadFixed(){
  document.getElementById("download_fixed_cont").style.display = "block";
  document.getElementById("download_fixed_show").style.display = "none";
  document.getElementById("download_fixed_hide").style.display = "inline";
  return(false);
}
function hideDownloadFixed(){
  document.getElementById("download_fixed_cont").style.display = "none";
  document.getElementById("download_fixed_show").style.display = "inline";
  document.getElementById("download_fixed_hide").style.display = "none";
  return(false);
}