var Screen = {

  getYmd: function() {
    var Ymd = "";
    var formdata = Form.getElements("main_form");
    for (var i = 0, n = formdata.length; i < n; i++) {
      if (formdata[i].name == "calvalue") {
        Ymd = formdata[i].value;
        break;
      }
    }
    Ymd = Ymd.split("/"); 
    return {"y": Ymd[0], "m": Ymd[1], "d": Ymd[2]};
  },

  helpOpen: function() {
    $("help").style.display = "block";
    $("help_close").style.display = "block";
  },

  helpClose: function() {
    $("help").style.display = "none";
    $("help_close").style.display = "none";
  }
}