An HTML/CSS Parser

First, this viewer could not be realized without a DOM¹ parser which is able to parse and recognize html/css elements of a web page. Todd blanchard (my mentor) has already build a such programm. His parser is ver powerfull. It constructs a DOM Tree containing all html document parsed nodes. Moreover, main nodes contains their CSS properties which are very important for the rendering.
In order to render an html document, my program have to use the parser to load html and css informations in a DOM Tree. Then, it must browse this tree an build each node render. It must be done in a recursive way.
In this way, the first part of my work is to understanding how using this parse.(DONE) Example of a DOM Tree: