javascript - How to not upload images / files upon form submit -


i have got simple form , upload images once main submit button pressed not upload images once button pressed? ideas? please see executing different action on form. 

 <form method="post" name="form" id="form" action="upload.php" enctype="multipart/form-data">      <input  class="button_date" id="fileinputbox" style="margin-bottom: 5px;" type="file" name="file[]" extension="jpeg|jpg|png|gif|giff|tiff" required/>      <input class="button2 cancel" style="border-right:none; font-size:13px;" name="back" id="back" type="submit"  value="back" onclick="javascript: form.action='back.php';"/>      <input class="button2" style="border-right:none; font-size:13px;" name="list item" id="submit" type="submit" value="list item" onclick="removefocus()"/>   </form>

if disable input not submitted, see here more details values of disabled inputs not submited?

so add:

document.getelementbyid('fileinputbox').disabled = true;

ie

<input class="button2 cancel" style="border-right:none; font-size:13px;" name="back"      id="back" type="submit"  value="back"      onclick="javascript:document.getelementbyid('fileinputbox').disabled = true;      form.action='back.php';"/>

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