DOM

(Document Object Model). Document Object Model is a platform and language-independent standard object model for representing HTML or XML and related formats. A web browser is not obliged to use the DOM in order to render a HTML document. however the DOM is required by JavaScript scripts that wish to inspect/modify content on a webpage. This is one reason why firefox is better than Internet Explorer (IE), firefox uses the DOM perfectly and IE uses some bits but other bits its does its own thing. The point of the DOM is a standard for everyone to follow allowing code to work in every browser.