text: function isFetchingDetails() {
    let id = document.getElementById("va-info-container").getAttribute("data-fetching");
    return (id == null || id == 0) ? false : true;
  }
  
  function setFetchingDetails(voiceActorId) {
    document.getElementById("va-info-container").setAttribute("data-fetching", voiceActorId);
    document.getElementById("fetch-icon").innerHTML = "ア";
    document.getElementById("fetch-icon").style.display = "";
  }
  
  function unsetFetchingDetails() {
    document.getElementById("va-info-container").setAttribute("data-fetching", 0);
    document.getElementById("fetch-icon").innerHTML = "";
    document.getElementById("fetch-icon").style.display = "none";
  }
  
  function getFetchingDetailsId() {
    let id = document.getElementById("va-info-container").getAttribute("data-fetching");
    return (id == null) ? 0 : id;
  }
  