Fires when the user presses the F1 key while the browser is the active window. dhtml语法 | Inline HTML | <ELEMENT onhelp = "handler" ... >
| All platforms |
|---|
| Event property | object.onhelp = handler | JScript only |
|---|
| object.onhelp = GetRef("handler") | Visual Basic Scripting Edition (VBScript) 5.0 or later only | | Named script |
<SCRIPT FOR =
object EVENT = onhelp>
| Internet Explorer only |
|---|
Event Information | Bubbles | Yes |
|---|
| Cancels | Yes |
|---|
| To invoke |
Press the F1 key. |
|---|
| Default action |
Firing the onhelp event opens an online Help window. |
|---|
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. |
|---|
| 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.
|
|---|
| 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. |
|---|
| 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. |
|---|
是否符合公共标准
There is no public standard that applies to this event.
Applies To |
A,
ADDRESS,
APPLET,
AREA,
B,
BDO,
BIG,
BLOCKQUOTE,
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,
window,
XMP | |
|