html - How do I put a horizontal line/border right in the middle of a table row? -

Basically I'd like to implement a bottom limit , but instead of being below, I want to put it in the dead center.

How can I do with CSS and Embedded? HTML only (and not use any graphics)?

So the height of the cell / row is 50px, and imagine the width = 100px, I should be the width of the line = 100px, and it should be 25px in row / cell height

Thank you.

Imagine something like cross-out functionality for PS font - but for the spaces (if that means any meaning).

Maybe a and lt in the cell; HR & gt; and then use CSS to give it a complete position.