if (document.images) 
{
   img1 = new Image();
   img2 = new Image();
   img3 = new Image();
   img4 = new Image();
   
   img5 = new Image();
   img6 = new Image();
   img7 = new Image();
   img8 = new Image();
   img9 = new Image();
   
   img1.src = "/images/navAbout-hover.gif";
   img2.src = "/images/navServices-hover.gif";
   img3.src = "/images/navPortfolio-hover.gif";
   img4.src = "/images/navContact-hover.gif";
   
   img5.src = "/images/subheadAbout.jpg";
   img6.src = "/images/subheadServices.jpg";
   img7.src = "/images/subheadPortfolio.jpg";
   img8.src = "/images/subheadContact.jpg";
   img9.src = "/images/subheadHome.jpg";
}