Splitting Chapter label and Title in html output

[Peter Fleck <peterfleck@gmail.com>]

Hi all,

Is it possible to split the Chapter label and Title in the html output. 
I want to have:

Chapter 1.
The title of the chapter

I did it ages ago on the FO output but can't replicate what I did for 
the html. Which template should I be modifying?

Thanks,

Peter