javascript
<script src="http://malsup.github.com/jquery.form.js"></script>
$("#ajaxUploadForm").ajaxForm({
iframe: true,
beforeSubmit: function () {},
success: function (result) {},
error: function (xhr, textStatus, errorThrown) {}
});
$('form#ajaxUploadForm').submit();
view
<form action="/Product/Upload" enctype="multipart/form-data" id="ajaxUploadForm" method="post">
<input id="ajax_uploader" name="ajax_uploader" onchange="ajax_uploader_func();" type="file" />
<input id="ajaxUploadSubmit" name="ajaxUploadSubmit" style="display: none;" type="submit" value="submit123" />
</form>