Yes that works for full lines. However if I use the example - Name: ______ , then I get "Name:" underlined also, which I don't want. This can be used in a table and only apply the div to the cell for the underline, but become cumbersome when there are multiple different length lines with blanks, e.g.

Name: _____________ (to right margin)
Address: _______________ (to right margin)

That would require lots of different table columns and spans.

Still searching for a good solution.

Thanks.