var s_popupOptions = 'width=400,height=250,top=0,left=0';
var s_simmYear = "2290";

  /*
   * PopupWindows
   */
  function PopupWindow(s_windowSpec)
  {
    var t=window.open(s_windowSpec,'setPop',s_popupOptions);
  }
  
  /*
   * CalculateBD
   */
  function CalculateBD()
  {
    document.theForm.birthdate.value = document.theForm.birthmonth.value + "/" + document.theForm.birthday.value + "/" + (s_simmYear-document.theForm.age.value);
    document.theForm.displayBD.value = document.theForm.birthdate.value;
  }