$("#system-form").submit(function (e) {
    $.ajax({
        type: "GET",
        url: "myurl",
        data: "User.Username=" + localStorage.getItem("guid") + "&User.Password=" + localStorage.getItem("password") + "&User.SecUser=" + localStorage.getItem("secUser") + "&ClientAppID=" + localStorage.getItem("ClientAppId") +"&"+ $(this).serialize(),
    })
    .done(function(data) {
        //parse data
    })
    .fail(function (xhr, textStatus, error) {
        console.log(JSON.stringify(xhr.responseText));
    });
    e.preventDefault();
});