[HtmlUnit] Patch for onchange' event on 'select' elements

[<Mik...@su...>]

Let's try this again; this time with a decent subject line and an attachment
that won't get its formatting all messed up.

Attached is a patch against the latest sources that implements Javascript
support for the 'onchange' event on 'select' elements.

Mike

(See attached file: patch)