To include active help links in your documentation, you must first declare the use of the supporting JavaScript code. The live help JavaScript is located in the org.eclipse.help plug-in. You refer to it using the help system's cross plug-in referencing technique. This script reference should be placed in the HEAD section of your HTML:
<script language="JavaScript" src="PLUGINS_ROOT/org.eclipse.help/livehelp.js"> </script>
In the body of your documentation, you invoke the liveAction script.
<a href='javascript:liveAction( "org.eclipse.platform.doc.isv", "org.eclipse.platform.doc.isv.activeHelp.ActiveHelpOpenDialogAction", "")'>Click here for a Message.</a>
The parameters for liveAction are