This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
You'll pretty much have to do that yourself. You could use the built in reset() function, but that will return the form to it's original state. The problem with that is if you have the form populated with any data when the page loads, reset() will just put it back to that. If your form always starts completely blank, then you can probably get away with using reset() though.