How to create a window over a form

[cupboy]

Look at this bitmap. There is a window on the lower right with some radio buttons and an OK button. This comes up when clicking on the button that says "Selected Threads". I'd like to know how to write code to do this. Could be some sort of JQuery code, not sure. And what would this type of form/window be called?

www.bidco.com/docs/bitmapFORM_ON_TOP_howdoIdothis.jpg

[Krik]

They are basically using CSS.

It is likely a div that has its "display" set to "none" with a "z-index" greater than that of the underlying content.

You then just use javascript to change the "display: none;" to "display: block"

I would guess they are also using the "position", "top", and ""left" elements to get it to align where they want it. Of course they maybe using javascript to set them also, depending on some other factors.