In the HTML of this page, this div is here, just chillin'. But on the domready function our code to create a PopUpWindow effectively snatches that content out of the div, and into the pop-up window you see now.

The CSS model of PopUpWindow is pretty comprehensive, so you can style to your heart's content.

With the option to set the className for windows in the contructor you can even have multiple stylings of pop up windows at the same time (all though the only use case I've encountered for this is this demo!).

This window is resizable using the icon in the lower-right corner.

'Nuff said.