DOM Element Width before Appended to DOM

I’m sure the answer is no, but is it possible to determine the width of an element before it is appended to the DOM?

Once it’s appended, I know I can use offsetWidth and offsetHeight.

Thanks

Answer

The trick is to show the element (display:block) but also hide it (visibility:hidden) and to set it’s position to absolute so that it doesn’t affect the page flow.

The MooTools Element.Measure class does this, as Oscar mentioned.