Custom Tooltips for every field on a CRM Form in MS CRM 4.0

Tooltips are available on every field on a MS CRM form. The current tooltips show the text of the label but we can change the contents of the current tooltips.
The restrictions to the tooltips are:-
1. Its unformatted text
2. And should not be more than 512 characters.

The onLoad code:
crmForm.all.new_attribute_c.title = “contents of the tooltip”