The document.title javascript manipulates the appearance in the active tab, and the titlebar of the browser. As far as I could tell from online readings, that was the only way to manipulate it. It didn't appear you could manipulate it via jQuery.

The code above, manipulates the string's appearance in the page content itself - the white, "Mozmill (x) Results Dashboard" in the colored bar. From various readings, this jQuery method was considered best practice.