I am been looking at the whitepaper Client-Side Custom Context Menus in Web Access 8.1  I understand the basics of what I need to do to create a custom menu.   What I am having problems with is finding documentation for functions and parameters.

see example from whitepaper below.

Retrieve a list of selected entries by calling context.getSelectedItems(" ENTRIES"); The parameter ENTRIES retrieves a list containing only documents, folders, and shortcuts. Alternatively, you can pass the following: PAGES or ANNOTATIONS.

Where can I find documentation that explain what methods are allowable from context and allowed parameters.    

Could someone point me in the right direction