ajax post form with jQuery

ajax_post_form.js

$("#enqueue_form").submit(function(event) {
    event.preventDefault(); //cancel event
    var form_data = new FormData($("#enqueue_form").get(0));
    $.ajax({
        url: "/bench",
        type: "POST",
        data : form_data,
        dataType: "json",
        processData: false,
        contentType: false,
        timeout:10000,
        success: function(data) {
            // do something
            console.log(data);
        },
        error: function(XMLHttpRequest, textStatus, errorThrown) {
            // do something
            console.log(XMLHttpRequest);
            console.log(textStatus);
            console.log(errorThrown);
        }
    });
});