Order of focus for text entry inputs

I have a web page that is generated by a php script and on this page there are several html text entry slots such as echo "<b>Special Notes:</b><input name=\"specialNotes\" size=\"65\"$prodNotes>"; on one page. I fill in several of these input slots with default values, but there are about 3-4 that require the user to manually type an answer. I was wondering if there was a way to control which text entry slots the cursor will go to when the user hits tab? Ideally I would like the cursor to automatically move first to the three that require the user to type something, and then move on to the slots that already have a default value. Is this possible in php, I didn't see any reference to giving items focus in the manual? If it is not possible in php, is there some way that I can have this web page (that is being generated by a php script) use javascript to create my desired order of focus? In general I have not seen any javascript inside a php script, although judging from a few other messages, this does seem to be possible. Thanks for any ideas, Andrew V. Romero