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| Property/method value type: | Boolean primitive | |||||||
| JavaScript syntax: | - | myObject.onmouseover = aHandler | ||||||
| HTML syntax: | <A onMouseOver="..."> <AREA onMouseOver="..."> <HTMLTag onMouseOver="..."> <IMG onMouseOver="..."> <LAYER onMouseOver="..."> | |||||||
| Argument list: | aHandler | A reference to a function object to handle the event | ||||||
As the mouse moves over the object, this event is triggered. Normally, passing over a link will display its value in the status bar. You can inhibit this behavior by returning the Boolean true value leaving the status line unchanged. Returning false allows the browser to overwrite the status line with the URL value of the link.
DOM level 2 classifies this as a MouseEvent and specifies that it uses bubbling propagation and can be cancelled.
You may need to implement an onMouseOut handler to clear the status line again if you used this event handler to display a message in the status line. That would be necessary in particular for Netscape 2.0 and 3.0 on the Windows platform.
Be sure to set the Boolean return value correctly to either allow or deny the browser permission to perform its normal default behavior on return from the event handler.
As a mouse is moved over an element, an entry event is triggered. It can cause severe browser crashing problems if you are creating and destroying objects under the mouse while it is moving. In particular, the destruction of an object can mean that the mouse out has no logical destination since it must somehow leave the element it entered.
A
ACRONYM
ADDRESS
Anchor
APPLET
AREA
B
BIG
BLOCKQUOTE
BODY
BUTTON
CAPTION
CENTER
Checkbox
CITE
CODE
DD
DEL
DFN
DIR
DIV
DL
Document
DT
EM
FIELDSET
FileUpload
FONT
FORM
H1
HR
I
IMG
Input
INS
KBD
LABEL
Layer
LEGEND
LI
LISTING
MAP
MARQUEE
MENU
OL
P
Password
PLAINTEXT
PRE
Q
RadioButton
ResetButton
S
SAMP
Select
SMALL
SPAN
STRIKE
STRONG
SUB
SubmitButton
SUP
TABLE
TBODY
TD
TEXTAREA
TextCell
TFOOT
TH
THEAD
TR
TT
U
UL
Url
VAR
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JavaScript Programmer's Reference, Cliff Wootton Wrox Press (www.wrox.com) Join the Wrox JavaScript forum at p2p.wrox.com Please report problems to support@wrox.com © 2001 Wrox Press. All Rights Reserved. Terms and conditions. | ||