(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
    var args_len = arguments.length;
    for (var i = args_len; i--;) {
      var cacheImage = document.createElement('img');
      cacheImage.src = arguments[i];
      cache.push(cacheImage);
    }
  }
})(jQuery)

jQuery.preLoadImages("images/btn_01_over.gif", "images/btn_02_over.gif", "images/btn_03_over.gif", "images/btn_04_over.gif", "images/btn_05_over.gif", "images/btn_06_over.gif", "images/btn_07_over.gif", "images/btn_08_over.gif","images/btn_09_over.gif","images/btn_01.gif", "images/btn_02.gif", "images/btn_03.gif", "images/btn_04.gif", "images/btn_05.gif", "images/btn_06.gif", "images/btn_07.gif", "images/btn_08.gif","images/btn_09.gif");