function hasISOSupport() {
    var d = new Date(Date.UTC(2000, 0));
    return !!d.toISOString && d.toISOString() === '2000-01-01T00:00:00.000Z';
  }
@method now()
@returns String
@polyfill ES5
@static
@short Returns the current time as a Unix timestamp.
@extra The number of milliseconds since January 1st, 1970 00:00:00 (UTC).

@example

  Date.now() -> ex. 1311938296231

*