onbeforeupdate event
Fires on a databound object before updating the associated data in the data source object.
Syntax
| HTML Attribute | <element onbeforeupdate = "handler(event)"> |
| Event Property | object.onbeforeupdate = handler; |
| attachEvent Method | object.attachEvent("onbeforeupdate", handler) |
| addEventListener Method | object.addEventListener("beforeupdate", handler, useCapture) |
Event information
| Synchronous | No |
| Bubbles | Yes |
| Cancelable | Yes |
Event handler parameters
- pEvtObj [in]
Type: IHTMLEventObj
Standards information
There are no standards that apply here.
Remarks
If the HTMLImgEvents::onbeforeupdate event is canceled, the HTMLImgEvents::onafterupdate event does not fire.
Signals that the data contained in an object has changed.
To invoke this event, do one of the following:
- Cause an object to receive focus, change the value of the object, and either cause the object to lose focus or force the document to unload.
The pEvtObj parameter is required for the following interfaces:
- HTMLAnchorEvents2
- HTMLAreaEvents2
- HTMLButtonElementEvents2
- HTMLControlElementEvents2
- HTMLDocumentEvents2
- HTMLElementEvents2
- HTMLFormElementEvents2
- HTMLImgEvents2
- HTMLFrameSiteEvents2
- HTMLInputFileElementEvents2
- HTMLInputImageEvents2
- HTMLInputTextElementEvents2
- HTMLLabelEvents2
- HTMLLinkElementEvents2
- HTMLMapEvents2
- HTMLMarqueeElementEvents2
- HTMLObjectElementEvents2
- HTMLOptionButtonElementEvents2
- HTMLScriptEvents2
- HTMLSelectElementEvents2
- HTMLStyleElementEvents2
- HTMLTableEvents2
- HTMLTextContainerEvents2
- HTMLWindowEvents2