var b = navigator.userAgent.toLowerCase();

var browser = {
	version: (b.match(/.+(rv|it|ra|ie)[\/: ]([\d.]+)/) || [])[2],
	safari: /webkit/.test(b),
	opera: /opera/.test(b),
	msie: /msie/.test(b) && !/opera/.test(b),
	mozilla: /mozilla/.test(b) && !/(compatible|webkit)/.test(b)
};
b = null;