Hi, just a quick question. This is a quote from an article by the Autistic Cuckoo (in the "finally" bit:

If you specify the width for an absolutely positioned element, either
explicitly via width in percents, or implicitly
via left and right, the standard says that it should
be computed relative to the containing block. Both Internet Explorer
and Opera get this wrong, unfortunately, and use the width of the
parent element as the basis for their computations.
What is a "containing block"? Is it simply the "youngest" of the parent elements that has position?