The event attributes listed below are standard, and are supported by most HTML and XHTML tags. HTML 4 added the ability to let events trigger actions in a browser, like starting JavaScript when a user clicks on an element.
Content Events
Only used in <body> and <frameset> elements.
| Attribute | Value | Description |
|---|---|---|
| onload | script | Script to be run when a document loads. |
| onunload | script | Script to be run when a document unloads. |
Form Events
Only used in <form> elements.
| Attribute | Value | Description |
|---|---|---|
| onblur | script | Script to be run when an element loses focus. |
| onchange | script | Script to be run when an element changes. |
| onfocus | script | Script to be run when an element gets focused. |
| onreset | script | Script to be run when a form is reset. |
| onselect | script | Script to be run when an element is selected. |
| onsubmit | script | Script to be run when a form is submitted. |
Image Events
Only used in <img /> elements.
| Attribute | Value | Description |
|---|---|---|
| onabort | script | Script to be run when loading of an image is interrupted. |
Keyboard Events
Useless in <base />, <bdo>, <br />, <frame />, <frameset>, <head>, <html>, <iframe>, <meta />, <param />, <script>, <style>, and <title>.
| Attribute | Value | Description |
|---|---|---|
| onkeydown | script | Script to be run when a key is pressed. |
| onkeypress | script | Script to be run when a key is pressed and released. |
| onkeyup | script | Script to be run when a key is released. |
Mouse Events
Useless in <base />, <bdo>, <br />, <frame />, <frameset>, <head>, <html>, <iframe>, <meta />, <param />, <script>, <style>, and <title>.
| Attribute | Value | Description |
|---|---|---|
| onclick | script | Script to be run on a mouse click. |
| ondblclick | script | Script to be run on a mouse double-clicked. |
| onmousedown | script | Script to be run when mouse button is pressed. |
| onmousemove | script | Script to be run when mouse pointer moves. |
| onmouseout | script | Script to be run when mouse pointer moves out of an element. |
| onmouseover | script | Script to be run when mouse pointer moves over an element. |
| onmouseup | script | Script to be run when mouse button is released. |