dHTML is merely a browser feature that provides your browser (Web page) to be dynamic. dHTML is not Javascript although it relies on it, but Javascript used in webpage relies heavily on the fourth generation browser features. So, in short although it is Javascript and HTML but can't be called so because of its reliance on the browser features. Only those 4th generation browser allows over web page to be dynamic.

So what exactly is dynamic when we say dHTML?

By dynamic we meant to say that the webpage ability to modify itself on certain functions when activated by users. Change can be either content or the layout on the fly.

Advantages:-

1. Fast and Zippy: - dHTML loads content on fly. Your whole page does not loads but only the content part that needs to be altered, so saving the crucial time for the users and giving the snazzy look to the website.

2. Plug-ins, we don