[j lunis]

I have spent a lot of the morning researching and playing with a form
and can't find the answer.
I want to have a line similar to
NAME: __________________________________________
with the underline at a fixed length when printed.
On the underline I want a field that can be of varying length (but not
longer than the underline.
I can get the fixed length underline and I can get the filed but I can
find no way to get both.