What happens when an iPhone/iPad keyboard is shown/closed in Safari?

I'm trying to understand what happens after the "Done" button is clicked on the iPhone/iPad keyboard when viewing a webpage in Safari, specifically what events are fired.

From what I can gather so far, the text box that was selected loses it's focus.

Is this all that happens, or does the whole window lose it's focus?

I'm also interested to know if the showing of the keyboard causes any resize events to be fired?