// pre-load images
if (document.images) 
{
   img1 = new Image();
   img2 = new Image();
   img3 = new Image();
   img4 = new Image();
   img5 = new Image();
   img1.src = "images/home_text.gif";
   img2.src = "images/web-O.gif";  
   img3.src = "images/email-O.gif";  
   img4.src = "images/bg1.gif";
   img5.src = "images/bg1_ie7.gif";

}