function setup() {
  if (!("lcred" in sessionStorage))
    return;
  var url = "/uinfo/email?key=" + sessionStorage.getItem("lcred");
  var req = new XMLHttpRequest();
  req.onreadystatechange = function () {
    if (req.readyState != 4 || req.status != 200) 
      return;
    var reply = JSON.parse(req.responseText);
    if (!("email" in reply))
      return;
    document.getElementById("input_email").value = reply["email"];
  }
  req.open('GET', url, true);
  req.send();
}

function postemail() {
  if (!("lcred" in sessionStorage))
    return;
  var posturl = "/uinfo/email?key=" + sessionStorage.getItem("lcred");
  var msg = {"v": document.getElementById("input_email").value};
  var req = new XMLHttpRequest();
  req.open('POST', posturl, true);
  req.send(JSON.stringify(msg));
}

function postpw() {
  if (!("lcred" in sessionStorage))
    return;
  var posturl = "/uinfo/pw?key=" + sessionStorage.getItem("lcred");
  var msg = {"v": document.getElementById("input_pw").value};
  var req = new XMLHttpRequest();
  req.open('POST', posturl, true);
  req.send(JSON.stringify(msg));
}