onmouseover Event

Fires when the user moves the mouse pointer into the object.

dhtml语法

Inline HTML	<ELEMENT onmouseover = "handler" ... >	All platforms
Event property	object.onmouseover = handler	JScript only
	object.onmouseover = GetRef("handler")	Visual Basic Scripting Edition (VBScript) 5.0 or later only
Named script	<SCRIPT FOR = object EVENT = onmouseover>	Internet Explorer only

Event Information

Bubbles	Yes
Cancels	Yes
To invoke	Move the mouse pointer into an object.
Default action	Initiates any action associated with this event.

Event Object Properties

Although event handlers in the DHTML Object Model do not receive parameters directly, a handler can query an event object for data.

available properties

altKey	Sets or retrieves a value that indicates the state of the ALT key.
altLeft	Sets or retrieves a value that indicates the state of the left ALT key.
button	Sets or retrieves the mouse button pressed by the user.
cancelBubble	Sets or retrieves whether the current event should bubble up the hierarchy of event handlers.
clientX	Sets or retrieves the x-coordinate of the mouse pointer's position relative to the client area of the window, excluding window decorations and scroll bars.
clientY	Sets or retrieves the y-coordinate of the mouse pointer's position relative to the client area of the window, excluding window decorations and scroll bars.
ctrlKey	Sets or retrieves the state of the CTRL key.
ctrlLeft	Sets or retrieves the state of the left CTRL key.
fromElement	Sets or retrieves the object from which activation or the mouse pointer is exiting during the event.
offsetX	Sets or retrieves the x-coordinate of the mouse pointer's position relative to the object firing the event.
offsetY	Sets or retrieves the y-coordinate of the mouse pointer's position relative to the object firing the event.
returnValue	Sets or retrieves the return value from the event.
screenX	Retrieves the x-coordinate of the mouse pointer's position relative to the user's screen.
screenY	Sets or retrieves the y-coordinate of the mouse pointer's position relative to the user's screen.
shiftKey	Sets or retrieves the state of the SHIFT key.
shiftLeft	Retrieves the state of the left SHIFT key.
srcElement	Sets or retrieves the object that fired the event.
toElement	Sets or retrieves a reference to the object toward which the user is moving the mouse pointer.
type	Sets or retrieves the event name from the event object.
x	Sets or retrieves the x-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element.
y	Sets or retrieves the y-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element.

Remarks

The event occurs when the user moves the mouse pointer into the object, and it does not repeat unless the user moves the mouse pointer out of the object and then back into it.

Examples

This example uses the onmouseover event to apply a new style to an object.

<DIV>
<P onmouseover="this.style.color='red'"
onmouseout="this.style.color='black'">
Move the mouse pointer over this text, then move it elsewhere in the
document. Move the mouse pointer over this text, then move it
elsewhere in the document.
</DIV>

This example shows how to change the value of a text area in response to mouse events.

<DIV>
<P>Move the mouse pointer into the text area to fire the
onmouseover event. Move it out to clear the text.
<TEXTAREA NAME=txtMouseTrack
onmouseover="this.value='onmouseover fired'"
onmouseout="this.value=''">
</TEXTAREA>
</DIV>

This feature requires Microsoft® Internet Explorer 4.0 or later. Click the following icon to install the latest version. Then reload this page to view the sample.

是否符合公共标准

This event is defined in HTML 4.0 .

Applies To

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=file, INPUT type=image, INPUT type=password, INPUT type=radio, INPUT type=reset, INPUT type=submit, INPUT type=text, 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

更多语法参考

onmousewheel, onmousedown, onmousemove, onmouseout, onmouseup