dpinion - 8:09 pm on Oct 13, 2010 (gmt 0)

Your post has me quite confused. When you say horizontal dotted line, I assume you mean to say vertical? From your code your div should be the same size as its <td> container(firebug confirms this).

You can vary the height of either div to expand it down:

<table> <tr> <td> <div style="border-right: 3px dotted black;"> Column1: Lots of content in here, with divs, etc... Longer than Column 2 </div> </td> <td> <div style="border-right: 3px dotted black;min-height:200px"> Column 2: Some shorter content here </div> </td> </tr> </table>

What exactly are you trying to do?