var login = false;
document.onkeydown = function keyPress(evt) {
  var keyCode =  document.layers ? evt.which : document.all ? event.keyCode : document.getElementById ? evt.keyCode : 0; 
  if (keyCode == 13 && !login) { 
    $('#lBox').hide();
    $('#pBox').show();
    $('#login').html("<a onClick='resetForm()'>" + $('#lField').val() + "</a>");
    $('#pField').focus();
    login = true;
  } else if (keyCode == 13 && login) { 
    $('#pBox').hide();
    $('#hBox').show();
    $('#login').empty();
    $('#hBox').html('<img src="/img/load.gif" alt="Loading" />');
    $.post('/ajax', {login: $('#lField').val(), pass: $('#pField').val()}, function(data) {
        window.location.href = data;
    });
  }
}
function resetForm() {
  $('#login').empty();
  $('#pBox').hide();
  $('#lBox').show();
  $('#lField').focus();
}