ASP .NET multi file upload selection enable

Hi

I'm using the multifile.js from http:/开发者_JS百科/www.fyneworks.com/jquery/multiple-file-upload/ and it works but the question is how to make the select field multiselect?

I want to be able to select multiple files at once instead of adding them one at a time.

I've tried other upload controls and they dont work with the CMS that i'm using now.

Thanks