Quirks Mode, IE7 Mode, IE8 Mode, IE9 Mode, and IE10 Mode (All Versions)
Occurs just before the data source control changes the current row in the object. By default, signals that the row in the databound object is about to be changed.
To invoke, change rows in the data source.
Context Info: qualifier, recordset
This attribute is an extension to HTMLElement.
See also onrowenter.