Property:  Opacity (version Pro only)

Makes the group appear semi-transparent.

A value of 100 keeps the group fully opaque (default).

A value of zero makes the group fully transparent.

Note that semi-transparency is available on the following browsers only!:

IE 5.0+, Netscape 7.0+, Mozilla 1.0+

The rest of the browsers will display the group as fully opaque (default value).