techslides

<input type="file" name="file" id="file">
<input type="submit" id="submit" name="Upload" onclick="upload();return false;">

<script type="text/javascript">
function upload(){
  var formData = new FormData();
  formData.append("action", "upload-attachment");
	
  var fileInputElement = document.getElementById("file");
  formData.append("async-upload", fileInputElement.files[0]);