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