JS Binding Event Method: AddEventListener and attachevent compatibility with different browsers

JS's event binding method, ie only support attachevent, and FF and Chrome only support AddEventListener, so you have to do the two methods compatible, the principle is to first inferattachevent is only true (exists), assuming true is the attachevent () method. Otherwise, use AddEventListener (). also, to avoid inferring each time the event is bound. Ability to encapsulate a function myaddevent (OBJ,EV,FN) {}. the code is as follows:
<! DOCTYPE html>

JS Binding Event Method: AddEventListener compatibility with Attachevent's different browsers