onfocus event

[This documentation is preliminary and is subject to change.]

Fires when the object receives focus.

HTML 4.01 Specification, Section 18.2.3

Syntax

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

Standards information

Event information

Synchronous No
Bubbles No
Cancelable No

Event handler parameters

Remarks

Note  Using the setActive method has no effect on document focus. Using the focus method on an individual element causes the element to gain focus and become the active element.

When one object loses activation and another object becomes the activeElement, the onfocus event fires on the object becoming the activeElement only after the onblur event fires on the object losing activation. Use the focus events to determine when to prepare an object to receive input from the user.

Elements cannot receive focus until the document is finished loading.

For Microsoft Internet Explorer 5.5 and later, focus on a document, and the active element of a document can be managed separately. The synchronous events onactivate and ondeactivate provide better control for managing activation changes.

As of Microsoft Internet Explorer 5, elebrowserments retain focus within the current history when the user returns to a page. To avoid firing the onfocus event unintentionally for an element when the document loads, invoke the focus method on another element.

As of Internet Explorer 5, you can force elements that do not implicitly receive focus to receive focus by adding them to the document tabbing order using the TABINDEX attribute.

Sets focus to an object.

To invoke this event, do one of the following:

  • Click an object.
  • Use keyboard navigation.
  • Invoke the focus method.
  • Invoke the setActive method.

The pEvtObj parameter is required for the following interfaces:

See also

Reference

blur

focus

onfocusin

 

 

Build date: 1/23/2012