onunload (HTML attribute)
| Depr. | Version |
|---|---|
| No | HTML 4 |
| IE5.5+ | FF1+ | SA1.3+ | OP9.2+ |
|---|---|---|---|
| Full | Full | Full | Full |
Syntax
Description
The
onunload event is used to trigger an action once a
web page has unloaded (or the browser window has been closed)—effectively,
the point at which the visitor to that page has navigated away by
following a link, submitting a form, or using some other mechanism that
causes a new page to be loaded in its place.
It may also be used in
the context of framesets to indicate that the child
frame elements have unloaded or been replaced with new
documents.
Example
When used as an inline attribute,
onunload is most frequently applied to the
body element, as shown below:
<body onunload="sayGoodbye();">
Value
This attribute has no fixed value.
It’s up to the author to decide on the scripting that’s included here, be
that a call to one or more defined functions, or a simple
alert() statement.
Compatibility
| Internet Explorer | Firefox | Safari | Opera | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 5.5 | 6.0 | 7.0 | 1.0 | 1.5 | 2.0 | 1.3 | 2.0 | 3.0 | 9.2 | 9.5 |
| Full | Full | Full | Full | Full | Full | Full | Full | Full | Full | Full |
Every browser listed supports this attribute. However, it should be avoided as it encourages the mixing of content and behavior.
User-contributed notes
There are no comments yet.
Add a note
To post a note on this topic, please log in with your SitePoint username and password. If you don't have an account yet, you can create a new account for free.