Set Focus on specific button in CGI form?

I've got a little script that just shows page after page of images,
to go through a huge collection of image files - what I do is display
the images one at a time on a form, with buttons: "Keep for further
consideration for assignment A", "Keep for further consideration for
assignment "B", and "Ignore". (actually, the buttons are labeled, 
"Keep", "Skip", and "Interesting".

When I paint the form, can I set one of these buttons as "default",
i.e., when it shows me the page can I make it already have focus on
the "Skip" button, since that's the default, so I don't have to mouse
to the button, but could just hit "enter" to select it?

Thanks - if this isn't clear, I'll be happy to go into more detail,
if you'd like.

Thanks,
Rich