function addFavorite(categoryId, returnURL) {
  document.favoriteForm.CATEGORY_ID.value = categoryId;
  document.favoriteForm.mode.value = "add";
  document.favoriteForm.returnURL.value = returnURL;
  document.favoriteForm.submit();
  return false;
}
function removeFavorite(categoryId, returnURL) {
  document.favoriteForm.CATEGORY_ID.value = categoryId;
  document.favoriteForm.mode.value = "remove";
  document.favoriteForm.returnURL.value = returnURL;
  document.favoriteForm.submit();
  return false;
}