onload (HTML attribute)
| Depr. | Version |
|---|---|
| No | HTML 4 |
| IE5.5+ | FF1+ | SA1.3+ | OP9.2+ |
|---|---|---|---|
| Full | Full | Full | Full |
Syntax
Description
The
onload event is used to trigger an action once a
web page has completely loaded all content and, importantly, all of the
external resources that the page calls in (including images, script files,
CSS files, and so on).
It may also be used in the context of
framesets to indicate that the child
frame elements have finished
loading.
Example
When onload
is used as an inline attribute, it’s most frequently applied to the
body element, as shown below:
<body onload="initialiseHoverEffects();">
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.
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