Don’t you dare get rid of that doctype declaration, that’ll just break IE even more.
Anyhow, since you probably don’t feel like rewriting the entire page and style sheet, just define all your div classes to have a relative position. The fastest way is like so (in the CSS file, natch):
div { position: relative; }
And if I could make one recommendation: don’t use the <font> tag. Use <span> instead. Just replace “font” in all your font tags with “span” and you’ll be golden.
Also, regarding Armilla’s suggestion: it’s unnecessary. I’ve never had to use it. I guess it wouldn’t hurt to include it, but it’s an extra step you don’t need, since every browser can handle <link> tags just fine.