(function($) {
	$.fn.maxlength = function(options) {
	  var defaults = {
	    counter: '#counter',
	    maxlength: 160
	  };

	  var opts = $.extend(defaults, options);
    var status = $(opts.counter);
    status.text(opts.maxlength);

    $(this).keyup(function(event) {
      status.text(opts.maxlength - $(this).val().length);
    })
	};
})(jQuery);