June 2010 Edition
Computer Science Department, University of Cape Town
| MSc-IT Study Material June 2010 Edition Computer Science Department, University of Cape Town |
There are many HTML attributes for handling events in JavaScript. The following table lists the main ones, and the objects that support them. You do not have to memorise this list, but you should be aware of the sort of events that can be handled.
| HTML Event Attribute | Object supporting event |
|---|---|
| onAbort — triggered when document loading interrupted | Image |
| onBlur — triggered when an input element loses focus | Text elements, Window, other elements |
| onChange — triggered when user selects or deselects an element or enters text and moves focus to another input element | Select, text input elements |
| onClick — triggered when user clicks once; return false to cancel default action of following a link, submitting, etc. | Link, button elements |
| onError — triggered when an error occurs while loading an image | Image |
| onFocus — triggered when an element is given focus | Text elements, Window, other elements |
| onKeyDown — triggered when a key is pressed down by user; return false to cancel | Document, Image, Link, Text elements |
| onKeyPress — triggered when key is either pressed or released; return false to cancel | Document, Image, Link, Text elements |
| onKeyUp — triggered when the user released a key; return false to cancel | Document, Image, Link, Text elements |
| onLoad — triggered when document or image finishes loading | Window, Image |
| onMouseDown — triggered when mouse left button pressed down by user; return false to cancel | Document, Image, Link, button elements |
| onMouseOut — triggered when mouse is moved away from element | Link, Image, Layer |
| onMouseOver — triggered when mouse pointer moved over element; for anchors, return true to prevent URL display in status area | Link, Image, Layer |
| onMouseUp — triggered when user releases mouse button; return false to cancel | Document, Image, Link, button elements |
| onReset — triggered when form reset requested; return false to stop reset | Form |
| onResize — triggered when window is resized | Window |
| onSubmit — triggered when form submission requested; return false to stop submission | Form |
| onUnload — triggered when document is unloaded | Window |