The XMLHttpRequest Level 2 standard (still a working draft) defines the FormData interface. This interface enables appending File objects to XHR-requests (Ajax-requests). Btw, this is a new feature - in the past, the "hidden-iframe-trick" was used (read about that in my other question). This is how it works (example): var xhr = new XMLHttpRequest(), fd = new FormData(); fd.append( 'file', input.fi
![How to send FormData objects with Ajax-requests in jQuery?](https://cdn-ak-scissors.b.st-hatena.com/image/square/98d6f053a97a87156775f60757c60865d0f2c47d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fstackoverflow%2FImg%2Fapple-touch-icon%402.png%3Fv%3D73d79a89bded)