if (document.images) {
    // preload the alternate images offscreen
   q11on = new Image();
   q11on.src = "../images/home-roll.jpg";
   q12on = new Image();
   q12on.src = "../images/faq-roll.jpg";
   q13on = new Image();
   q13on.src = "../images/about-roll.jpg";
   q14on = new Image();
   q14on.src = "../images/email-roll.jpg";
   q15on = new Image();
   q15on.src = "../images/contact-roll.jpg";
   prodon = new Image();
   prodon.src = "../images/products-on.gif";
   howtoon = new Image();
   howtoon.src = "../images/howto2-on.gif";
   faqon = new Image();
   faqon.src = "../images/faq-on.gif";
   locateon = new Image();
   locateon.src = "../images/locate-on.gif";
   shopon = new Image();
   shopon.src = "../images/shop-on.gif";
   abouton = new Image();
   abouton.src = "../images/about-on.gif";
   contacton = new Image();
   contacton.src = "../images/contact-on.gif";
   conteston = new Image();
   conteston.src = "../images/contest-on.gif";
   galleryon = new Image();
   galleryon.src = "../images/gallery-on.gif";
   videoon = new Image();
   videoon.src = "../images/green-video-how.gif";
   experton = new Image();
   experton.src = "../images/green-watch-pro.jpg";
   collegeon = new Image();
   collegeon.src = "../images/college-on.gif";
   orderon = new Image();
   orderon.src = "../images/order-on.gif";
   sampleon = new Image();
   sampleon.src = "../images/sample-on.gif";
   q11off = new Image();
   q11off.src = "../images/home.jpg";
   q12off = new Image();
   q12off.src = "../images/faq.jpg";
   q13off = new Image();
   q13off.src = "../images/about.jpg";
   q14off = new Image();
   q14off.src = "../images/email.jpg";
   q15off = new Image();
   q15off.src = "../images/contact.jpg";
   prodoff = new Image();
   prodoff.src = "../images/products-off.gif";
   howtooff = new Image();
   howtooff.src = "../images/howto2-off.gif";
   faqoff = new Image();
   faqoff.src = "../images/faq-off.gif";
   locateoff = new Image();
   locateoff.src = "../images/locate-off.gif";
   shopoff = new Image();
   shopoff.src = "../images/shop-off.gif";
   aboutoff = new Image();
   aboutoff.src = "../images/about-off.gif";
   contactoff = new Image();
   contactoff.src = "../images/contact-off.gif";
   contestoff = new Image();
   contestoff.src = "../images/contest-off.gif";
   galleryoff = new Image();
   galleryoff.src = "../images/gallery-off.gif";
   videooff = new Image();
   videooff.src = "../images/white-video-how.gif";
   expertoff = new Image();
   expertoff.src = "../images/white-watch-pro.jpg";
   collegeoff = new Image();
   collegeoff.src = "../images/college-off.gif";
   orderoff = new Image();
   orderoff.src = "../images/order-off.gif";
   sampleoff = new Image();
   sampleoff.src = "../images/sample-off.gif";
}

function imgAct(imgName) {
  if (document.images) {
     document[imgName].src = eval(imgName + "on.src");
 }
}

function imgInact(imgName) {
  if (document.images) {
     document[imgName].src = eval(imgName + "off.src");
 }
}