Fix Element Vertically But Not Horizontally?

I'm working on a blog design. (See code below.) I'd like to fix #title vertically so that when people scroll down the blog, it stays in view in the window. I couldn't think of a CSS way to do it. Using position:fixed doesn't work because if someone is viewing the site from a netbook, or simply from a downsized browser on their normal computer, #title is either cut off -- if it's positioned relative to the left -- or it overlaps the blog content -- if it's positioned relative to the right.

I've read suggestions to use Javascript but my Javascript skills are practically non-existent. The suggestions were to use an onscroll handler, and to use scrollTop. This is what I wrote but (probably for obvious reasons) it isn't working:

Code:
window.onscroll = verticalFix();
function verticalFix() {
var sidebar = document.getElementById("title");
sidebar.style.top = .scrollTop(30);

[Code]...