onload event

發行項
05/02/2017

Fires immediately after the client loads the object.

Syntax

HTML Attribute	<element onload = "handler(event)">
Event Property	object.onload = handler;
attachEvent Method	object.attachEvent("onload", handler)
addEventListener Method	object.addEventListener("load", handler, useCapture)

Event information

Synchronous	No
Bubbles	No
Cancelable	No

Event handler parameters

pEvtObj [in]
Type: IHTMLEventObj

Standards information

HTML 4.01 Specification, Section 18.2.3

Remarks

The client loads applications, embedded objects, and images as soon as it encounters the applet, embed, and img objects during parsing. Consequently, the HTMLOptionButtonElementEvents::onload event for these objects occurs before the client parses any subsequent objects. To ensure that an event handler receives the HTMLOptionButtonElementEvents::onload event for these objects, place the script object that defines the event handler before the object and use the HTMLOptionButtonElementEvents::onload attribute in the object to set the handler.

The HTMLOptionButtonElementEvents::onload attribute of the body object sets an HTMLOptionButtonElementEvents::onload event handler for the window. This technique of calling the window HTMLOptionButtonElementEvents::onload event through the body object is overridden by any other means of invoking the window HTMLOptionButtonElementEvents::onload event, provided the handlers are in the same script language.

Loads the object for which the event is specified.

To invoke this event, do one of the following:

Open a document to invoke this event for the document or any object within it.

The pEvtObj parameter is required for the following interfaces:

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