title: How to not send an input field in a <form>?
body: <p>Relating to my <a href="https://stackoverflow.com/questions/15660686/after-resizing-image-using-javascript-how-to-upload-via-php-using-post">last question</a>. I have an upload field where the user can choose a picture and this becomes resized (client-side via JavaScript), base64 encoded (JavaScript as well) and sent via a hidden field. I do this in order to save bandwidth of the user (e.g. usage with a 3G connection).</p>
  
  <p>But I don't know how to not send the user upload file <code>&lt;input type="file" name="file" id="file" class="span4"&gt;</code> within the <code>&lt;form&gt;</code> tags. The obvious solution would be to exclude the file upload field from the form but this would kill my layout. Is this possible?</p>