numberify = function(s) {
            var c = 0;
            return parseFloat(s.replace(/\./g, function() {
                return (c++ == 1) ? '' : '.';
            }));
        }
Static method for parsing the UA string. Defaults to assigning it's value to Y.UA
@static
@method Env.parseUA
@param {String} subUA Parse this UA string instead of navigator.userAgent
@returns {Object} The Y.UA object