gistfile1.js

var call = Function.prototype.call;
var apply = Function.prototype.apply;
call.call = call;
call.apply = apply;
apply.call = call;
apply.apply = apply;
var hop = Object.prototype.hasOwnProperty;
var hasOwnProperty = function(obj, prop){
  return call.call(hop, obj, prop);
};

console.log(hasOwnProperty({foo:15}, 'foo'));
console.log(hasOwnProperty({foo:15}, 'toString'));

Function.prototype.call = null;
Function.prototype.apply = null;
console.log(hop.call);
console.log(hop.apply);

console.log(hasOwnProperty({foo:15}, 'foo'));
console.log(hasOwnProperty({foo:15}, 'toString'));