window.document.onkeypress = keypress_action;
function keypress_action(event)
{
  if (!event) event = window.event;
  if (event.which == 13 || event.keyCode == 13 || event.keyCode == 3)
  {
    login();
    return false;
  }
}
function login()
{
   document.forms[0].code.value = document.getElementsByName("code")[1].value;
   document.forms[0].password.value = hex_sha256(hex_sha256(document.getElementsByName("password")[1].value));
   return document.login.submit();
}