DHTML Event Handlers
HTML events can trigger actions in the browser, like starting a
JavaScript when a user clicks on an element.
Don't Click On This Text
Examples
onclick
Turn on the light! How
to change an image when the user clicks it.
onmousedown & onmouseup
This time the light
is on only when the user holds down the mouse button.
onload
Displays an alert box when the page has finished loading.
Event handlers
An event handler allows you to execute code when an event
occurs.
Events are generated by the browser when the user clicks an element, when the page loads, when a form is submitted,
etc.
Example
A header changes when the user clicks it:
<h1 onclick="this.innerHTML='Ooops!'">Click on this text</h1>
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Try it yourself
You can also add a script in the head section of
the page and then call the function from the event handler:
<html>
<head>
<script type="text/javascript">
function changetext(id)
{
id.innerHTML="Ooops!";
}
</script>
</head>
<body>
<h1 onclick="changetext(this)">Click on this text</h1>
</body>
</html>
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HTML 4.0 Event Handlers
| Event |
Occurs when... |
| onabort |
a user aborts page loading |
| onblur |
a user leaves an object |
| onchange |
a user changes the value of an object |
| onclick |
a user clicks on an object |
| ondblclick |
a user double-clicks on an object |
| onfocus |
a user makes an object active |
| onkeydown |
a keyboard key is on its way down |
| onkeypress |
a keyboard key is pressed |
| onkeyup |
a keyboard key is released |
| onload |
a page is finished loading |
| onmousedown |
a user presses a mouse-button |
| onmousemove |
a cursor moves on an object |
| onmouseover |
a cursor moves over an object |
| onmouseout |
a cursor moves off an object |
| onmouseup |
a user releases a mouse-button |
| onreset |
a user resets a form |
| onselect |
a user selects content on a page |
| onsubmit |
a user submits a form |
| onunload |
a user closes a page |
More About HTML Events
For a full overview please refer to the complete
DOM Event Object Reference in our HTML
DOM tutorial.
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