beforeactivate | onbeforeactivate event

Fires immediately before the object is set as the active element.

Syntax

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

 

Event information

SynchronousNo
BubblesYes
CancelableYes

 

Event handler parameters

pEvtObj [in]

Type: IHTMLEventObj

Standards information

There are no standards that apply here.

Remarks

Each document may have up to one active element. Set the active element with the setActive or focus methods. 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.

Using the focus method on a document that does not have the focus moves the document to the front of the display. Additionally, the document's active element gains focus.

For a given display, only one element has focus at any given time. Striking a key directly affects only the element with focus. Events fired by that keystroke may be scripted to affect other documents and child elements.

With Microsoft Internet Explorer 5.5 and later, focus on a document, and the active element of a document can be managed separately. With Microsoft Internet Explorer 6 and later, use the onbeforeactivate event to cancel setting an element as active. Canceling an element's onbeforeactivate event has three different behaviors, depending on the action which fired the event.

  • When fired by a user clicking on the element, canceling will force the focus on the parent element and bubble up the chain until it hits a focusable element.
  • When fired by a user tabbing through the document, canceling will force the focus on the next element in the taborder. Shift-tab will force the focus on the previous element in the taborder.
  • When fired programmatically by the focus or the document.setActive methods, canceling will have no effect.

Note  The onbeforeactivate event cannot be canceled when fired programmatically.

Change activation from the event.fromElement to the event.srcElement.

To invoke this event, do one of the following:

  • Click an element, other than the active element of the document.
  • Use the keyboard to move focus from the active element to another element.
  • Invoke the setActive method on an element, when the element is not the active element.
  • Invoke the focus method on an element, when the element is not the active element.

The pEvtObj parameter is required for the following interfaces:

See also

a
address
applet
area
b
bdo
big
blockQuote
body
button
caption
center
cite
code
custom
dd
dfn
dir
div
dl
document
dt
em
embed
fieldSet
font
form
hn
hr
i
img
input type=button
input type=checkbox
input type=email
input type=file
input type=image
input type=number
input type=password
input type=radio
input type=range
input type=reset
input type=search
input type=submit
input type=tel
input type=text
input type=url
kbd
label
legend
li
listing
map
marquee
menu
nextID
noBR
ol
p
plainText
pre
rt
ruby
s
samp
select
small
span
strike
strong
sub
sup
table
tBody
td
textArea
tFoot
th
tHead
tr
tt
u
ul
var
xmp
Reference
onactivate
onbeforedeactivate
ondeactivate
onfocusin
onfocusout

 

 

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