Keeping footer on the bottom

Some of my articles are not very large, but I would like the footer to stay on the bottom of the browser window. I am not sure how to do this in this template.

add blank new lines (<br/> in html) in article

This is not a good solutions surely - what happens when viewed on different size screen resolutions? I thought it would of been sticky like most footers are or is there a reason it is not?

You can use min-height css property but it's not quite compatible.

.content_pad{
min-height:xxx;
-moz-min-height:xxx;
}