malsup jQuery Form: How to enable submit button after form is bound

malsup jQuery Form: How to enable submit button after form is bound

Guys, I have a form with image preview using malsup Jquery Form
But when I submit the form, the submit button has got no action. I know it's been defaultPrevent-ed by the Plugin to run an AJAX call. I don't know how to enable the button. how do I do it? 


  1. <form id="multiple_upload_lampiran" 
        method="post" 
        name="multiple_upload_lampiran" 
        action="lampiran_upload.php" 
            enctype="multipart/form-data">
            <input type="hidden" 
                name="image_lampiran_submit" 
                value="1"/>
            <div class="row">
                <input type="file" id="lampiran-images" 
                    class="lampiran_file" name="lampiran[]" multiple>
            </div>
            <div class="row">     
                <div class="input-field col s4">
                    <div class="lampiran-gallery" 
                        id="lampiran-preview"></div>
                    
                </div>
            </div> 
	      <input type="text" name="C4" 
                required/> <-- I need this value, 
                                  but the form prevented me T_T
	      <input type="submit" id="submit-lampiran" 
                  class="btn green right" name="edit" 
              value="Simpan" /> <-- this button can't be clicked
           <a class="btn orange waves-effect waves-light" 
                href="?page=nilai">Back</a>
</form>

// jQuery Form only for image preview
$('#lampiran-images').on('change',function() {
      $('#multiple_upload_lampiran').ajaxForm({
            target: "#lampiran-preview",
            beforeSubmit:function(e) {
                  //
            },
            success:function(e) {
                  //
                },
            error:function(e) {
                  //
            }
          }).submit()
})