Fires when the user presses the F1 key while the browser is the active window.
| Inline |
<element onhelp = "handler" ... > |
| Script |
object.onhelp = handler |
| Bubbles |
Yes |
| Cancels |
Yes |
| To invoke |
Press the F1 key. |
| Default action |
Firing the onhelp event opens an online Help window. |
While event handlers in the Document Object Model do not receive parameters directly, the handler can query the event object for data.
Event Object Properties
| cancelBubble |
Sets or retrieves whether the current event should bubble up the hierarchy of event handlers. |
| clientX |
Retrieves the x-coordinate of the position of the cursor when the mouse is clicked, relative to the size of the client area of the window but excluding window decorations or scroll bars. |
| clientY |
Returns the y-coordinate of the position of the cursor when the mouse is clicked, relative to the size of the client area of the window but excluding window decorations or scroll bars. |
| ctrlKey |
Retrieves the state of the CTRL key. |
| offsetX |
Retrieves the horizontal coordinate of the mouse's position relative to the object firing the event. |
| offsetY |
Retrieves the vertical coordinate of the mouse's position relative to the object firing the event. |
| returnValue |
Sets or retrieves the return value from the event. |
| screenX |
Retrieves the horizontal position of the mouse, in pixels, relative to the user's screen. |
| screenY |
Retrieves the vertical position of the mouse, in pixels, relative to the user's screen. |
| shiftKey |
Retrieves the state of the SHIFT key. |
| srcElement |
Retrieves the object that fired the event. |
| type |
Retrieves the event name from the event object. |
| x |
Returns the horizontal position of the mouse when the event fires. |
| y |
Returns the vertical position of the mouse when the event fires. |