caktux putting things together

/*
  Usage:
    $('.ro').rollover();
 
  Options:
    'states':
        For 'myimage_on.png' and 'myimage_off.png':
          $('.ro').rollover({'states':['_on','_off']});
 
        or for 'img_ro.png' and 'img.png' (default)
          $('.ro').rollover({'states':['_ro','']});
*/
(function($) {
  $.fn.rollover = function(options) {
    return $.fn.rollover.init(this, options);
  };
  $.fn.rollover.init = function(images, options) {
    var settings = {
      'states': ['_ro','']
    };
    if (options) $.extend(settings, options);