Fix for bug 96534: The version, component, and milestone select lists on the query...

Fix for bug 96534: The version, component, and milestone select lists on the query page were slow to reflow when you changed the product in the first select list.  This patch is a complete rewrite from scratch of the javascript used on query.cgi, which results in an approximately 700% speed increase in the reflow time when changing the selected product.
Patch by Chris Lahey <clahey@ximian.com> and Christian Reis <kiko@async.com.br>
Javascript changes r= caillon@returnzero.com, louie@ximian.com
Perl changes r= jake@acutex.net, justdave@syndicomm.com