change focus to another window. the window to change focus to may be specified by its server assigned window handle, or by the value of its name attribute.
to find out the window handle use <code>window_handles</code> protocol action
name
type
description
<code>handleorname</code>
string
the server assigned window handle or the name attribute.
<code>callback</code>
optional
function
optional callback function to be called when the command finishes.