The Java Viewer component that ships with FileNet P8 Platform relies on technology designed by Daeja Image Systems. In this Zip file you will find the following Adobe PDF files produced by Daeja:
ViewONE HTML and Installation Manual
ViewONE JavaScript API Manual
FileNet supports customization of the Java Viewer functionality, except against those HTML calls that Daeja added expressly for FileNet internal use. These calls are not included in the ViewONE HTML and Installation Manual noted above, but are annotated in the Java Viewer's HTML code. You must avoid modifying this FileNet-specific code in any way.