Attach multiple files to a Desk email form. Input fields must be generated on the fly and can't be hard-coded on the page.

01 - desk-external-variables

  <!-- add to desk-external-variables div -->
  <div id="max_number_attachments">{{desk.system.max_attachments}}</div>
  <div id="system-snippets-add_attachment">{{system.snippets.add_attachment}}</div>

02 - inputs

<div class="desk_file_upload2">
  <div style="clear:left;">
    <input class="up" name="case_attachment[attachment]" size="84" type="file">
  </div>
  <div style="clear:left;">
    <input class="up" name="case_attachment2[attachment]" size="84" type="file">
  </div>
  <div style="clear:left;">
    <input class="up" name="case_attachment3[attachment]" size="84" type="file">
  </div>
</div>