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. |