This demo demonstrates how these windows work--the HTML source files used in the demo can be used as templates. The Popup Demo and Secondary Window Demo topics contains a number of examples that show how these windows can be used.
More information about using popups and secondary windows as well as information about how to create custom JComponents can be found in the JavaHelp User's Guide which is included in this release.
Sources
The HTML pages that comprise this demo can be found in:
demos\object\hs
The source code for the components can be found in src.jar at:
src\impl\com\sun\java\javahelp\impl