function openDiv(div_id, hint_id) {
  var obj_ctrl = getObj(div_id);
  var hint_ctrl = getObj(hint_id);
  if ( obj_ctrl && hint_ctrl ) {
    if (obj_ctrl.style.display == "none") {
      obj_ctrl.style.display = "block";
      hint_ctrl.innerHTML = "Скрыть";
    } else {
      obj_ctrl.style.display = "none";
      hint_ctrl.innerHTML = "Подробнее";
    }
  }
}
  
function getObj(obj_name, doc_obj) { //get DOM node
  if (!doc_obj) doc_obj = document;
  if (doc_obj.all)
      return doc_obj.all[obj_name];
  else if (doc_obj.getElementById)
      return doc_obj.getElementById(obj_name);
  return null;
}