DHTML: A Set of Technologies

Although HTML and DHTML differ from each other by only one letter, this letter opens up a new world. Unlike HTML, Dynamic HTML is not a description language but rather a concept, the vision of a dynamic Web made up of dynamic content.

The DHTML concept can be defined in the following way: it is the possibility of altering the content of a page at will after it has been loaded into the browser, without calling for action from the server. The first advantages of it are clear: there is no need to write any CGI scripts and there is an immediate interactivity.

To meet these goals, DHTML uses three technical components:

• first of all, script languages: essentially JavaScript, but also VBScript;
  
  
• then the famous CSS (Cascading Style Sheets);
  
  
• and, of course, HTML.