(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/btn1over.jpg", "images/btn2over.jpg", "images/btn3over.jpg", "images/btn4over.jpg", "images/btn5over.jpg", "images/btn6over.jpg","images/btn7over.jpg","images/btn8over.jpg","images/btn1.jpg","images/btn2.jpg","images/btn3.jpg","images/btn4.jpg","images/btn5.jpg","images/btn6.jpg","images/btn7.jpg","images/btn8.jpg");