HDTML is used for Changing the tags and properties, Real-time positioning, Dynamic fonts and Data binding.
DHTML is a collection of features that together, enable your web page to be dynamic.
The HTML DOM is the W3C standard Document Object Model for HTML. The HTML DOM defines a standard set of objects for HTML, and a standard way to access and manipulate them. DHTML is about using the DOM to access and manipulate HTML elements.
CSS (Cascading Style Sheets)
CSS allows web developers to control the style and layout of web pages.HTML 4 allows dynamic changes to CSS.