end page at the end of footer

Hi All,

I have designed a pretty simple site at www.butlerpartnersandassociates.com.au. I m having a small problem trying to make the page end at the end of the footer (hope that makes sense). i fixed the header gap at the top but can't fix the footer gap. I thought about setting the height but I remember previously seeing a better way to rectify the problem. But I can't remember the solution. Any ideas????

Warm Regards

Paul