Exposing more coordinates to the DOM

coordinates.js

(function () {
	function define(object, properties) {
		for (var property in properties) !(property in object) && Object.defineProperty(object, property, { get: properties[property], enumerable: true });
	}

	define(Element.prototype, {
		width: function () {
			return this.getBoundingClientRect().width;
		},
		height: function () {
			return this.getBoundingClientRect().height;
		},
		clientX: function () {
			return this.getBoundingClientRect().left;
		},
		clientY: function () {
			return this.getBoundingClientRect().top;
		},
		pageX: function () {
			return this.getBoundingClientRect().left + window.pageXOffset;
		},
		pageY: function () {
			return this.getBoundingClientRect().top + window.pageYOffset;
		}
	});
})();

coordinates.xie8.js

(function (window, document) {
	function define(object, properties) {
		for (var property in properties) !(property in object) && Object.defineProperty(object, property, { get: properties[property] });
	}

	define(window, {
		pageXOffset: function () {
			return (document.documentElement.scrollLeft || document.body.scrollLeft || 0) - (document.documentElement.clientLeft || document.body.clientLeft || 0);
		},
		pageYOffset: function () {
			return (document.documentElement.scrollTop || document.body.scrollTop || 0) - (document.documentElement.clientTop || document.body.clientTop || 0);
		}
	});

	define(Element.prototype, {
		width: function (coordinates) {
			return (coordinates = this.getBoundingClientRect()), coordinates.right - coordinates.left;
		},
		height: function (coordinates) {
			return (coordinates = this.getBoundingClientRect()), coordinates.bottom - coordinates.top;
		},
		clientX: function () {
			return this.getBoundingClientRect().left;
		},
		clientY: function () {
			return this.getBoundingClientRect().top;
		},
		pageX: function () {
			return this.getBoundingClientRect().left + window.pageXOffset;
		},
		pageY: function () {
			return this.getBoundingClientRect().top + window.pageYOffset;
		}
	});
})(window, document);