Width and height iframe Twenty Eleven

Hello,

I want to embed this website in an iframe at full-width and full-height: http://www.staoptegenkanker.nl/TeamTimmerman on this page (one column page): http://www.teamtimmerman.nl/doneren/ (part of http://www.teamtimmerman.nl)

How can I do this? I already tried:
#post-407 {
width: 1000px;
}

How can I align the iframe properly?

http://wordpress.org/extend/plugins/iframe/