I needed to create an image sprite using ten 16px square transparent PNG files. So I put together a simple HTML page with my 10 images inside a div with a background colour. I
Do you mean the bottom space? If so I have an answer to the similar question at
https://stackoverflow.com/a/15357037/1061567
If we are talking about other issue, please make it more clear by showing us some example at http://jsfiddle.net