Modal Form and file upload

Modal Form and file upload

Hello,

I'm using a "Modal Form" and it work great for a simple form.  But I want to add a file upload.  It doesn't work.  I read it's related to XmlHttpRequest that doesn't support file upload.

There is a way to bypass this limitation ?  I would like the file upload occurs at the same time my form is posted.  If possible, I would like to avoid flash solutions.

Thanks!