Checkpoint: More Structure

Like the HTML, the JavaScript we just wrote has structure. It's composed of a main function hung on a single variable, SEARCH, and an anonymous support function that automatically fires when the window is done loading.
Why is this important? If we hang everything on one single variable, it will be much more difficult for other JavaScript programs--third-party advertising, for example, or somebody's random Wordpress plug-in--to screw things up later.
To phrase it succinctly: global variables are evil. Douglas Crockford has an excellent article on this, on the Yahoo User Interface blog, here: http://yuiblog.com/blog/2006/06/01/global-domination.
Yes, this stuff gets confusing, so:

Remember to cheat when necessary!