file.js

;(function($) {
  $.fn.soon = function(what, when) {
    var $this, args;
    if (typeof when == "undefined") when = 5000;
    args = $.makeArray(arguments).slice(2);
    $this = $(this);
    setTimeout(function() {
      $this[what].apply($this,args);
    }, when);
    return $this;
  };
})(jQuery);