Dynamic HTML: The Definitive Reference

New Element Attributes

Practically every existing element has one or more new attributes in HTML 4.0. Many of these new attributes are applied to every element due to HTML 4.0’s focus on internationalization, accessibility, style sheets, and scripting. Table 7.3 lists the common attributes that have been added to most elements that can act as content containers (that is, they have start and end tags). Element-specific additions are not shown here, but are covered in full in Chapter 8.

Table 7-3. New HTML 4.0 Attributes Shared by Most Elements

Attribute	Description
CLASS	Group identifier (selector) for applying a style rule
DIR	Text direction of the element’s content
ID	Unique identifier (selector) for applying a style rule
LANG	Human language used in the element’s content
STYLE	Inline style sheet rule
TITLE	Short description of the element
onClick	Event handler for click events
onDblClick	Event handler for double-click events
onKeyDown	Event handler for keyboard key down events
onKeyPress	Event handler for keyboard key press (down and up) events
onKeyUp	Event handler for keyboard key up events
onMouseDown	Event handler for mouse down events
onMouseMove	Event handler for mouse movement inside the element
onMouseOut	Event handler for mouse movement out of the element
onMouseOver	Event handler for mouse movement into the element
onMouseUp	Event handler for mouse up events