object.create.js

// http://jsperf.com/new-vs-object-create-including-polyfill
if (typeof Object.create !== 'function') {
 Object.create = function(o, props) {
  function F() {}
  F.prototype = o;

  if (typeof(props) === "object") {
   for (prop in props) {
    if (props.hasOwnProperty((prop))) {
     F[prop] = props[prop];
    }
   }
  }
  return new F();
 };
}