XHTML Events

When you visit a website, you do things like click on text, images and hyperlinks, hover-over things, etc. These are examples of what JavaScript calls events.

We can write our event handlers in JavaScript or VBScript and can specify these event handlers as a value of event tag attribute. The XHTML 1.0 has a similar set of events which is available in HTML 4.01 specification.

The <body> and <frameset> Level Events

There are only two attributes which are used to trigger any JavaScript or VBScript code, when any event occurs at document level.

Attribute

Value

Description

onload

Script

Script runs when a XHTML document loads.

onunload

Script

Script runs when a XHTML document unloads.

The <form> Level Events

There are six attributes which are triggered when any event occurs at form level.

Attribute

Value

Description

onchange

Script

It is executed when the element changes.

onsubmit

Script

It is executed when the form is submitted.

onreset

Script

It is executed when the form is reset.

onselect

Script

It is executed when the element is selected.

onblur

Script

It is executed when the element loses focus.

onfocus

Script

It is executed when the element gets focus.

Keyboard Events

There are three events which are generated by keyboard. The keyboard events are not valid in base, bdo, br, frame, frameset, head, html, iframe, meta, param, script, style, and title elements.

Attribute

Value

Description

 

onkeydown

Script

This is executed when the user press the keyboard button.

onkeypress

Script

This is executed when the user press and release the keyboard button.

onkeyup

Script

This is executed when the user release the keyboard button.

Mouse Events

There are some mouse generated events which executes when it comes in contact with any HTML tag. These events are not valid in base, bdo, br, frame, frameset, head, html, iframe, meta, param, script, style, and title elements.

Attribute

Value

Description

onclick

Script

It is executed on a mouse click.

ondblclick

Script

It is executed on a mouse double-click.

onmousedown

Script

It is executed when mouse button is pressed.

onmousemove

Script

It is executed when mouse pointer moves.

onmouseout

Script

It is executed when mouse pointer moves out of an element.

onmouseover

Script

It is executed when mouse pointer moves over an element.

onmouseup

Script

It is executed when mouse button is released.