I have a fixed width for my HTML5 app in order to ensure things are stretched or moved incorrectly. The thing is, a lot of blank white space is added after it, causing a scroll bar to appear. Moreover, pressing space will force the page to scroll down. How can I get rid of this space without relying on resizing the app?

Also, does anyone know what HTML snippet I can add to vertically center the app on my page, and where to insert that snippet?

Thanks in advance. I'm horrible with web stuff.