title: how to open file chooser that can choose multiple files in Explorer
body: <p>I want to be able to open a file chooser dialog, from which I will be able to choose more than one file from the same dircetory. Similarly to the behavior that 'add attachment to gmail' provides.
  Only I don't need to upload the files immediately through Ajax. the files that I chosed can be uploaded later when pressing on the submit button of that dialog. <br> <br></p>
  
  <p>The technologies that are available for me are: <br>
  html, javascript,, JQuery (only if it's really needed) JSP, java</p>
  
  <p>Thanks</p>