SweetTitles - fading tooltips (and my extender)

Dusting Diaz, among other cool things, has written a nice Javascript library called SweetTitles to convert hyperlink's Title attribute (Tooltip property in ASP.NET HyperLink web controls) - those yellow popups appearing when you hover the mouse over them - into nice fading boxes. I thought I would ease its integration with ASP.NET into a draggable web control - as well as enhance it a bit. The control I created is a simple extender control and all you have to do is drag it onto your webform to see everything happen magically. All the HyperLinks and <a> tags on your page receive that nice effect for free.