Can't get all form data

I looked everywhere on the internet. Still stuck ... Here's where i'm stuck : I did a form which looks like this :

A multipart form, with two inputs : data & selectable item.

The problem is : I'm lost with dropzone, because I know that i've to declare it programmatically (because it's just a part of my form). But I only get the file data and not the select option. (Java servlet is good, after researchs, the problem is in my .jsp / .js files).

Here's my .jsp :

        <form action="upload" id="myform" method="post"
        enctype="multipart/form-data">
        <div id="mydz" class="dropzone dz-clickable hvr-outline-out" style="margin-bottom: 5px;">
            <div class="fallback">
                <input name="datafile" type="file" />
            </div>
        </div>

        <div id="procedure">
            Procédure : <select name="procedure">
                <option value="1">Toulouse</option>
                <option value="2">Tournefeuille</option>
                <option value="3">Cine 6</option>
                <option value="4">Cinéland</option>
            </select>
                 <input type="submit" id="sbmtbtn" value="Envoyer" />
        </div>
                    <script type="text/javascript" src="views/js/createDropzone.js"></script>
    </form>

And here's my .js called after creating the form fields :

    Dropzone.autoDiscover = false;

var myDropzone = new Dropzone("#mydz",
        {
    url : 'upload',// Action à appeler 
    /* Options */
    acceptedFiles: ".pdf", // Seulement les PDFs.
    addRemoveLinks : true,
    autoProcessQueue : false, // this is important as you dont want form to be submitted unless you have clicked the submit button
    uploadMultiple: false,
    parallelUploads: 1,
    maxFiles: 1,
    autoDiscover : false,
    paramName : 'datafile', // this is similar to giving name to the input type file like <input type="file" name="pic" />
    clickable : true, // this tells that the dropzone will not be clickable . we have to do it because v dont want the whole form to be clickable 
    accept : function(file, done) {
        console.log("Ajouté");
        done();
    },
    error : function(file, msg) {
        alert(msg);
    },
    init : function() {

        //Ajout possible de seulement 1 fichier
        this.on("addedfile", function() {
            if (this.files[1]!=null){
                this.removeFile(this.files[0]);
            }
        });

        //Envoi du fichier
        document.getElementById("sbmtbtn").onclick = function(e) {
            e.preventDefault(); //this will prevent the default behaviour of submit button because we want dropzone to submit the form
            myDropzone.processQueue(); // this will submit your form to the specified action which directs to your jsp upload code
            // after this, your whole form will get submitted with all the inputs + your files and the jsp code will remain as usual 
            //REMEMBER you DON'T have to call ajax or anything by yourself to submit the inputs, dropzone will take care of that
        };

    } // init end
        });

And, I did this to get all the datas from the servlet : http://ift.tt/1J7gV9P

I need a new POV, if anyone can help ...