How do I allow the user to move an absolutely positioned div?
<p>I am using jQuery to create a "dialog" that should show up in the center of the page on top of everything and should remain centered at all times unless the user moves  it. It has a header area (like a title bar) and I would like the user to be able to click there and drag the dialog "window" around. It is an absolutely positioned div. What is the best way to do this?</p>

<p>EDIT: I failed to mention that I would like to do it without jQuery UI if it's not terribly difficult. But I will look into how jQuery UI does it though. I may end up using it.</p>
