This is needed for setting up frames within a Notes database because the HTML <FRAMESET> directive must precede the <BODY> tag.
Create a new form called HTML with the first field named "HTML". You must call the field "HTML"; if you do not, Domino will put a <BODY> tag in front of everything in the HTML for the page automatically. This will let you code raw HTML and leave it in a Notes database instead of needing standalone HTML pages just to do frames.
In Domino 1.05 and above, you can also use the $$HTMLHead field to store code that should go within the <HEAD> tag.