JavaScript onload

The onload event occurs immediately after a page or an image is loaded.
onload事件当一个页面或是一张图片加载完成时被触发。

onload="所要执行的代码"

Parameter 参数	Description 注释
SomeJavaScriptCode 所要执行的代码	Required. Specifies a JavaScript to be executed when the event occurs. 必选项。当事件触发时所要执行的代码。

Supported by the following HTML tags:
所支持的HTML标签：

Supported by the following JavaScript objects:
所支持的JavaScript对象：

image, layer, window

In this example the text "Page is loaded" will be displayed in the status bar:
在下面的例子中，页面加载完成时页面状态栏将出现“页面已加载”：

<html>
<head>
<script type="text/javascript">
function load()
{
window.status="页面已加载"
}
</script>
</head>

<body onload="load()">
</body>

</html>