You could use a META"redirect":
<meta http-equiv="refresh" content="0; url=http://new.example.com/address" />
or JavaScript redirect (note that not all users have JavaScript enabled so always prepare a backup solution for them)
<script language="javascript"> window.location = "http://new.example.com/address";</script>
But I'd rather recommend using mod_rewrite, if you have the option.