onMouseOver Event Rules

HTML Markup Details

onmouseover and onmouseout attribute: The onmouseover and onmouseout event is often used to create styling effects, dispaly content from dynamic menus and provide contextual help information.
onfocus and onblur attribute: The onfocus and onblur events can be used to provide keyboard support to mouse pointer related events that are needed for accessibility.

onMouseOver Event Handler Rules
no.	FAE 2007	FAE 2008	Description
1	Pass/Fail	Pass/Fail	Every `onmouseover` event handler that is on a focuable element must have a corresponding `onfocus` event handler. Implementation Notes Focusable elements include: `a` elements with an `href` and/or `tabindex` atribute with a value greater than or equal 0. `input`, `select`, `button`, `textarea` and `area` elements.
2	Pass/Fail	Pass/Fail	Every `onmouseout` event handler that is on a focuable element must have a corresponding `onblur` event handler. Implementation Notes Focusable elements include: `a` elements with an `href` and/or `tabindex` atribute with a value greater than or equal 0. `input`, `select`, `button`, `textarea` and `area` elements.
3	n/a	Pass/Warning	Every `onmouseover` or `onmouseout` event handler that is not on a focusable element should use CSS `:hover` psuedo element to provide the stylistic changes. Implementation Notes Focusable elements include: `a` elements with an `href` and/or `tabindex` atribute with a value greater than or equal 0. `input`, `select`, `button`, `textarea` and `area` elements.

FAE 2007: The Illinois Functional Accessibility Evaluator (FAE) currently implements FAE 2007 rules.; The Illinois Firefox Accessibility Extension currently implements these rules.
FAE 2008: The FAE 2008 rules are designed to optimize the rules for implementation of Section 508, W3C Web Content Accessibility Guidelines and Illinois Information technology Accessibility Act requirements and are based on the requirements of these standards and experience with the problems of FAE 2007.; The Illinois Firefox Accessibility Extension currently implements some of these rules.