iphone - A html5 web app for mobile safari to upload images from the Photos.app?

Question

Is it possible to write a HTML5 web application designed for the iOS devices (iPad, iPhone, iPod Touch) which can allow the user to upload an image from the filesystem?

Imagine uploading a new photo to your twitter avatar via a web app.

Answer 1

UPDATE: iOs 6 Safari is going to support upload videos and images from the Photo Library.

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I hate this word, but, it's impossible (up now). Here is the reasons:

1) mobile safari doesn't support upload anything.

2) mobile safari can't access ios components (actually it can, but, only through phonegap)