# README: Web-based Help from DocBook XML
Developer Docs

# Developer Docs

This chapter provides an overview of how webhelp is implemented.

The table of contents and search panes are implemented as divs and rendered as if they were the left pane in a frameset. As a result, the page must save the state of the table of contents and the search in cookies when you navigate away from a page. When you load a new page, the page reads these cookies and restores the state of the table of contents tree and search. The result is that the help system behaves exactly as if it were a frameset.

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