cyclethrough() jquery plugin

gistfile1.js

/**
 * loops through the collection given by 'selector' within the called node, and
 * when the elem is moused-over (is that a word?) adjusts * the z-index at the
 * given interval for each. Like an animated GIF for any set of DOM nodes!
 * Meant to work with a set of images, like thumbnails, YMMV
 * 
 *  $('#video-thumbnails').cyclethrough('img', 800);
 *
 *  author sbeam
 *  license MIT
 */
(function( $ ){

  var methods = {
    do_cycle : function(selector, delay) {
      if (!this.cycleindex) this.cycleindex = 0;
      if (this.cycleindex >= $(selector, this).length) this.cycleindex = 0;

      $(selector, this).css('z-index', 0).eq(this.cycleindex).css('z-index', 1);

      this.cycleindex++; 
      var context = this;
      this.timer = window.setTimeout(function() { methods.do_cycle.apply(context, [selector, delay]) }, delay);

    }
  };

  $.fn.cyclethrough = function(selector, delay) {

    $(selector, this).css('z-index', 0);

    return this.hover(function() { methods.do_cycle.apply(this, [selector, delay]) },
                      function() { window.clearTimeout(this.timer); });

  };
})( jQuery );