CSS/Html help - repost

This is a job that will probably take 5 minutes for someone who knows what they are doing: Please see the following website: [login to view URL] When viewed on certain bigger displays the website has a white strip running along the bottom. I would like to have someone look at the CSS and write the code that will stretch the height of the website so that it views fully stretched on all displays. Like I said a 5 minute job. Many thanks