2.3.4.6 onbeforedeactivate
onbeforedeactivate of
type Function
Occurs immediately before the active element is changed from the current element to another element in the parent document.
To invoke, click an element (other than the active element), use the keyboard to move focus, or invoke the focus() method.
Bubbles: Yes
Cancelable: Yes
Context Info: fromElement, srcElement
This attribute is an extension to HTMLElement.
See also onactivate, onbeforeactivate.