Pass an image through AJAX [duplicate]

$.ajax({
    type: "POST",
    url: pathname,
    data: new FormData($('#devis')[0]),
    processData: false,
    contentType: false,
    success: function (data) {
        $("#divider").html(data);
    }
});

<script type="text/javascript">
$(document).ready(function() {
$("#submit").click(function() {
  var fileInput = document.getElementById('image_input_field');
  var file = fileInput.files[0];
  var formData = new FormData();
  formData.append('file', file);
  // console.log(file);

  var societe = $("input#societe").val();
  var message = $("textarea#message").val();

      $.ajax({
        url: "ajax.php",
        type: "POST",
        data: "file="+file,
        cache: false,

        success: function(reponse) {
          if(reponse) {
            alert(reponse);

            // console.log(reponse);
            // $('#devis').trigger("reset");
          } else {
            alert('Erreur');
          }
        }
      });
 }); });
</script>

 echo 'something';

jQuery('#frmId').iframePostForm({
    json : true,
    post : function () {
        //return true or false
        return true;
    },
    complete : function (response) {
        //complete event
        console.log(response);
    }
});

$("#devis").ajaxSubmit(options); 
return false;

$ImageTempname  = $_FILES['ImageFile']['tmp_name'];
$ImageFilename  = $_FILES['ImageFile']['name'];
$ImageType      = $_FILES['ImageFile']['type'];