>>>This is what I looked at yesterday too. But you can see he is not using table there at all.
>>
>>The principal is the same : make the body section 'overflow:auto;'. Example using a table here: http://jsfiddle.net/venkateshwar/5KJka/1/
>>Just add the footer - it will work
>
>Do I need to explicitly set the height to some number as in the fiddle? Adding only overflow: auto; seems to have no effect. Looks like I do need to set the value to something, but how would I know the good value to set?

It's just the height of tbody. Use whatever value you want depending on how many rows should be visible at one time.....