I have seen a number of similar questions, but have not found an answer for what I am looking for. Further information is as follows:
Via css it may be possible but need some tricks.
You need to make both divs/columns very very tall by adding a padding-bottom: 1000px and then "trick the browser" into thinking they aren't that tall using margin-bottom: -1000px. It is better explained via example below.
http://jsfiddle.net/mediasoftpro/Ee7RS/
Hope this will be ok.