onbeforepaste (HTML attribute)
DescriptionThis event is fired before a user carries out a paste operation of content that was previously copied or cut to the clipboard; it fires immediately before the
No fixed value - could be a call
to one or more defined functions or a simple
Non-standard event defined by Microsoft for use in Internet Explorer. May work in some other browsers but cannot be reliably used. Compatibility for this non-standard attribute not tested.