how it works
A small piece of javascript reads al SPAN tags, checks if it has class="editText" and a id=. If that is true, it adds a onclick function. That onclick function will create a textfield or input (depending on the size of the editable text). Someone has the ability to edit the field. When the text field is blurred, it will read the contents, and starts a XMLHttpRequest and ‘sends’ the content + fieldname + any set vars to an update file. That file will update your database, and reply with the newly set text and the textfield will dissapear again.
IE? FF?
This script works in internet explorer, netscape and firefox. Any other platforms haven’t been tested. That’s kinda up to you.
Update: HACKS
If you want to force a textarea over a textfield (for example to edit a piece of HTML) use class="editText" offsetHeight="10”.
If you want to PUSH an ID to your script I use: id="edit_userID_$userID". In your update script, strip the text, and keep the $userID. Et voila.