How do you get this line effect?

I want to add the horizontal line between my popular posts. You can see an example of it here. In the example there is a line separating popular posts in his sidebar. Who do I achieve this using CSS?

Thanks!

 

div.theDivInQuestion {
    border-top: 2px solid #476283;
}

Code (markup):

 

Easiest way without going in and adding a HR in the markup, would just be border-top on each line-item.

Hopefully you won't try to 'fix' the height of each of them like that page did under 'recent comments' given how badly that breaks at large fonts/120dpi.

 

Thanks, nice color too.

Okay, I won't fix the height.