/*
  Many beginning jQuery people forget to save the results of a selection and
  just call $('foo') over and over. The only time you would need to do that is if the
  DOM changes. Otherwise you can just save the results somewhere when the
  selection is first made. Much more performant.

  Here's a mini jQuery plugin that just caches the results of a selector after
  the first time it's invoked.
*/

(function($){
  $.stale = function(selector){
    return $.lazy.lookup[selector] || ($.lazy.lookup[selector] = $(selector));
  };
  $.fresh = function(selector){
    return ($.lazy.lookup[selector] = $(selector));
  }
  $.stale.lookup = {};
})(jQuery);

//Usage

$.stale('#button').click(function(){
  $.stale('#button').val();
});

//if for some reason you need to refresh the lookup:
$.fresh('#button');