javascript - File upload change function submit form? -

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i trying post files jquery, didnt come anywhere, thinking if post form instead, when select files, have been same. got problem right now, aint posting form , cant figure out im doing wrong :s

js: 

$(".filesupload").on("change", function() {      $("#fileupload").submit(); });

html:

<li class="uploadbg">  <form method="post" action="index.php" id="fileupload" enctype="multipart/form-data">     <input type="file" name="filesupload[]" class="filesupload" multiple="">     <a href="#" class="btn btn-xs btn-default">     <span class="fa fa-upload"></span> ladda upp     </a>     </form>     </li>

css:

.uploadbg { position:relative;} .uploadbg input { width: 94px;height: 24px;position:absolute;top: 10px;z-index:1;opacity: 0;cursor:pointer }

hope of guys can tell me i'm doing wrong


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