Fires on a databound object before updating the associated data in the data source object.
Syntax
| Inline HTML | <ELEMENT onbeforeupdate = "handler" ... >
| All platforms |
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| Event property | object.onbeforeupdate = handler | JScript only |
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| object.onbeforeupdate = GetRef("handler") | Visual Basic Scripting Edition (VBScript) 5.0 or later only |
| Named script |
<SCRIPT FOR =
object EVENT = onbeforeupdate>
| Internet Explorer only |
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Event Information
| Bubbles | Yes |
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| Cancels | Yes |
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| To invoke |
Cause an object to receive focus, change the value of the object, and either cause the object to lose focus or force the page to unload. |
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| Default action |
Signals that the data contained in an object has changed. |
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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. |
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| altLeft |
Sets or retrieves a value that indicates the state of the left ALT key. |
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| cancelBubble |
Sets or retrieves whether the current event should bubble up the hierarchy of event handlers. |
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| 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. |
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| 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. |
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| ctrlLeft |
Sets or retrieves the state of the left CTRL key.
|
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| offsetX |
Sets or retrieves the x-coordinate of the mouse pointer's position relative to the object firing the event. |
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| offsetY |
Sets or retrieves the y-coordinate of the mouse pointer's position relative to the object firing the event. |
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| returnValue |
Sets or retrieves the return value from the event. |
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| screenX |
Retrieves the x-coordinate of the mouse pointer's position relative to the user's screen. |
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| screenY |
Sets or retrieves the y-coordinate of the mouse pointer's position relative to the user's screen. |
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| shiftLeft |
Retrieves the state of the left SHIFT key.
|
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| srcElement |
Sets or retrieves the object that fired the event. |
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| type |
Sets or retrieves the event name from the event object. |
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| x |
Sets or retrieves the x-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element. |
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| y |
Sets or retrieves the y-coordinate, in pixels, of the mouse pointer's position relative to a relatively positioned parent element. |
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Remarks
If the onbeforeupdate event is canceled, the onafterupdate event does not fire.
Standards Information
There is no public standard that applies to this event.
Applies To
|
A,
BUTTON,
DIV,
FRAME,
IFRAME,
IMG,
INPUT type=checkbox,
INPUT type=hidden,
INPUT type=password,
INPUT type=radio,
INPUT type=text,
TEXTAREA,
LABEL,
LEGEND,
MARQUEE,
SELECT,
SPAN,
BDO,
CUSTOM,
RT,
RUBY |
|
See Also
Introduction to Data Binding