function clearTag(tag_id){
  obj = document.forms['comment_f']

  text_obj = document.getElementById("come_tag" + tag_id);
  hidden_obj = document.getElementById("come_tag" + tag_id + "_hid");
  view_obj = document.getElementById('tag' + tag_id );
  
  text_obj.value = '';
  hidden_obj.value = '';
  view_obj.style.display = 'none';
}