function logMein() {
  var username = $("#usernameId").val();
  var password = $("#passwordId").val();
  $.post("./login.php", { username: username, password: password }, function(welcome) { $("#loginDiv").html(welcome); } );
}

// this won't work right because session variables won't die right unless page is refreshed
function logMeout() {
  var xmlLogoutObject = $.post("login.php", { session: 'destroy' }, function(goodbye) { $("#loginDiv").html(goodbye); } );
}