Getting an array of all events possible on winow and use to remove all events from an object

window_events.js

window.__defineGetter__('events',function(){
  var _events = []; 
  for (var k in window) {
    if(k.match(/^on/)){
      _events.push(k)
    }
  }; 
  return _events;
});

var _b = document.getElementsByTagName('body')[0];

_b.onclick = function(){alert('Hello world');} //click to see 'Hello world'

events.map(function(item) {
     _b[item] = undefined;
});

//click to see 'Hello world' no longer shows