More absolutely positioned DIVs, this time with z-index
values defined. Again, DIV "A1" is contained within DIV "A". DIV "B" is
independent.
Note that "B" appears on top of "A1," even though "A1" has a higher
z-index value. That's because its containing element, "A," has a
lower z-index value than "B."
Use your browser's View Source option to see the full source
code.
z-index: 100;
z-index: 300;
z-index: 200;