Wow,
I have built it some days before and found this thread today.
Now, If you want to remove the frame above your translated page, replace this link:
http://translate.google.com/translate by
http://www.google.com/translate_p.
To apply for all website (php site), you can use this link
http://$_SERVER[SERVER_NAME]$scriptpath:
EX:
<input type="hidden" name="u" value="http://$_SERVER[SERVER_NAME]$scriptpath" />
replace for <input type="hidden" name="u" value="http://YOURSITE.COM/$scriptpath" />
demo:
http://www.ue-global.com (the translation at the top of the page)
regards,
zerokun