hasOwnProperty.js

/*
	Cross-browser hasOwnProperty solution, based on answers from:
	http://stackoverflow.com/questions/135448/how-do-i-check-to-see-if-an-object-has-an-attribute-in-javascript
*/
if ( !Object.prototype.hasOwnProperty ) {
	Object.prototype.hasOwnProperty = function(prop) {
		var proto = obj.__proto__ || obj.constructor.prototype;
		return (prop in this) && (!(prop in proto) || proto[prop] !== this[prop]);
	};
}