var Browser = Class.create({
	initialize: function() {
		var userAgent = navigator.userAgent.toLowerCase();
		this.version = (userAgent.match( /.+(?:rv|it|ra|ie)[\/: ]([\d.]+)/ ) || [])[1];
		this.safari = /webkit/.test( userAgent );
		this.opera = /opera/.test( userAgent );
		this.msie = /msie/.test( userAgent ) && !/opera/.test( userAgent );
		this.mozilla = /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent );
	}
});