showHelp() in top.js simply calls showHelp2() in jcontrol.js

To restore intro help: showHelp('makeIntroHelp()');

showHelp2()
  saves current helpname as helpPanel
	prepends makeHelpPrefix()
	appends helpFooter (e.g. link back to Intro)

To re-display the current help (without knowing what it is) e.g.
see doHideBrowserAdvice() in top.js

		showHelp(helpPanel);

To re-display the current scene (with possible changes)

		reDisplay() in jcontrol.js (also does help)
