if (document.images) {
  image1on = new Image();
  image1on.src = "/images/sidebar/home-on.gif";

  image2on = new Image();
  image2on.src = "/images/sidebar/learn-on.gif";

  image3on = new Image();
  image3on.src = "/images/sidebar/bjbasic-on.gif";
 
  image4on = new Image();
  image4on.src = "/images/sidebar/basic-on.gif";

  image5on = new Image();
  image5on.src = "/images/sidebar/bj-on.gif";

  image6on = new Image();
  image6on.src = "/images/sidebar/progressive-on.gif";

  image7on = new Image();
  image7on.src = "/images/sidebar/card-on.gif";

  image8on = new Image();
  image8on.src = "/images/sidebar/download-on.gif";

  image9on = new Image();
  image9on.src = "/images/sidebar/register-on.gif";

  image10on = new Image();
  image10on.src = "/images/sidebar/affiliate-on.gif";

  image11on = new Image();
  image11on.src = "/images/sidebar/author-on.gif";

  image12on = new Image();
  image12on.src = "/images/sidebar/guarantee-on.gif";

  image13on = new Image();
  image13on.src = "/images/sidebar/mini-on.gif";

  image14on = new Image();
  image14on.src = "/images/sidebar/money-on.gif";

  image15on = new Image();
  image15on.src = "/images/sidebar/linkpartner-on.gif";

  
  image1off = new Image();
  image1off.src = "/images/sidebar/home-off.gif";

  image2off = new Image();
  image2off.src = "/images/sidebar/learn-off.gif";

  image3off = new Image();
  image3off.src = "/images/sidebar/bjbasic-off.gif";
 
  image4off = new Image();
  image4off.src = "/images/sidebar/basic-off.gif";

  image5off = new Image();
  image5off.src = "/images/sidebar/bj-off.gif";

  image6off = new Image();
  image6off.src = "/images/sidebar/progressive-off.gif";

  image7off = new Image();
  image7off.src = "/images/sidebar/card-off.gif";

  image8off = new Image();
  image8off.src = "/images/sidebar/download-off.gif";

  image9off = new Image();
  image9off.src = "/images/sidebar/register-off.gif";

  image10off = new Image();
  image10off.src = "/images/sidebar/affiliate-off.gif";

  image11off = new Image();
  image11off.src = "/images/sidebar/author-off.gif";

  image12off = new Image();
  image12off.src = "/images/sidebar/guarantee-off.gif";

  image13off = new Image();
  image13off.src = "/images/sidebar/mini-off.gif";
  
  image14off = new Image();
  image14off.src = "/images/sidebar/money-off.gif";

  image15off = new Image();
  image15off.src = "/images/sidebar/linkpartner-off.gif";
}

function changeImages() {
  if (document.images) {
    for (var i=0; i<changeImages.arguments.length; i+=2) {
      document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
    }
  }
}