@March 15, 2008, 1:22 a.m.
|onbeforeupdate||Firefox/Netscape/NN n/a IE 4(Win) Chrome/Safari/DOM n/a|
|Bubbles: Yes; Cancelable: Yes|
Fires just prior to sending data to a writable data source object (through the IE data binding mechanism). You can perform data validation and cancel the update.
Elements that accept data input and support data binding.
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