DHTML

• Dynamic HyperText Markup Language
• Using a client-side scripting language (JavaScript / JScript / ECMAScript) to manipulate HTML and CSS properties
• HTML extensions that allow a Web page to react to user input without sending requests to the Web server
• Not standardized

Key components

• HTML 4.0 introduced CSS (Cascading Style Sheets) and DOM (Document Object Model)
• CSS is a style and layout model for HTML documents
• DOM is a document content model for HTML documents
• JavaScript (and VBScript) allow scripting code to control HTML elements

• CSS Positioning allows control over element positioning and visibility (comparable to Layers in Netscape and Dynamic CSS in Internet Explorer)

Attributes

• left  : The element's left position
• top  : The element's top position

• visibility  : Whether an element is visible or hidden
• z-index  : The element's stack order for display (higher numbers have priority) ([-n .. n]) (default: 0)

• clip  : Element clipping
• overflow  : How overflow contents are handled

Resources

• DHTML Tutorial - W3Schools

Sources

• http://www.w3schools.com/dhtml/ - DHTML Tutorial
• http://builder.com.com/5100-31-5072657.html - Stupid Web Tricks: Menu Mien
• http://www.oreillynet.com/pub/a/javascript/2001/06/22/layers_part_two.html - Cross-Browser Layers