/**
 * Inspired from the book of JavaScript Patterns, Stoyan Stefanov.
 * You can add some special value in this guid, such as user's email or nickname or id.
 * @module guid for JavaScript client
 */
(function(exports){
	exports.guid = {
		'create': function(){
			return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
				var r = Math.random() * 16 | 0,
					v = c == 'x' ? r : (r & 0x3 | 0x8);
				return v.toString(16);
			}).toUpperCase();
		}
	};
})(window);