Changing text fonts and creating hyperlinks

[Loo, Peter # PHX]

Hi,
 
I was wondering how I would go about changing the color of text (APPEND
and TRUNCATE) for the following code:
 
      radio_group(-name=>'loadType',
           -values=>['APPEND', 'TRUNCATE'],
           -default=>'APPEND'),
      hr,
      submit("$submit"),
      hr,
    end_form();
 
In addition, I would like to know what the syntax is to make an email
address to be clickable as in HTML "mailto".
 
Thanks.
 
Peter