function (uastring) {

	        var ua = uastring || ((window && window.navigator && window.navigator.userAgent) ? window.navigator.userAgent : EMPTY);

	        this.getBrowser = function () {
	            return mapper.rgx.apply(this, regexes.browser);
	        };
	        this.getEngine = function () {
	            return mapper.rgx.apply(this, regexes.engine);
	        };
	        this.getOS = function () {
	            return mapper.rgx.apply(this, regexes.os);
	        };
	        this.getResult = function() {
	            return {
	                ua      : this.getUA(),
	                browser : this.getBrowser(),
	                engine  : this.getEngine(),
	                os      : this.getOS()
	            };
	        };
	        this.getUA = function () {
	            return ua;
	        };
	        this.setUA = function (uastring) {
	            ua = uastring;
	            return this;
	        };
	        this.setUA(ua);
	    }