onload Event

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# onload Event

Event Object

## Example

Execute a JavaScript when a page is finished loading:

<body onload="myFunction()">
Try it yourself »
(more examples at the bottom of this page)

## Definition and Usage

The onload event occurs when an object has been loaded.

onload is most often used within the <body> element to execute a script once a web page has completely loaded all content (including images, script files, CSS files, etc.).

## Syntax

In HTML:

<body onload="SomeJavaScriptCode">

In JavaScript:

window.onload=function(){SomeJavaScriptCode};

Parameter | Description
--- | ---
SomeJavaScriptCode | Required. Specifies a JavaScript to be executed when the event occurs

## Browser Support

The onload event is supported in all major browsers.

## onload is Supported by the Following HTML Tags:

<body>, <frame>, <frameset>, <iframe>, <img>, <input type="image">, <link>, <script>, <style>

## Try it Yourself - Examples

onload on <img>
Alert "Image is loaded" immediately after an image has been loaded.

Event Object

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