// JavaScript Document

normal_image1 = new Image();
normal_image1.src = "images/top_nav_home1.jpg";
mouseover_image1 = new Image();
mouseover_image1.src = "images/top_nav_home1_over.jpg";

normal_image2 = new Image();
normal_image2.src = "images/top_nav_aboutus2.jpg";
mouseover_image2 = new Image();
mouseover_image2.src = "images/top_nav_aboutus2_over.jpg";

normal_image3 = new Image();
normal_image3.src = "images/top_nav_products3.jpg";
mouseover_image3 = new Image();
mouseover_image3.src = "images/top_nav_products3_over.jpg";

normal_image4 = new Image();
normal_image4.src = "images/top_nav_faq4.jpg";
mouseover_image4 = new Image();
mouseover_image4.src = "images/top_nav_faq4_over.jpg";

normal_image5 = new Image();
normal_image5.src = "images/top_nav_performance5.jpg";
mouseover_image5 = new Image();
mouseover_image5.src = "images/top_nav_performance5_over.jpg";

normal_image6 = new Image();
normal_image6.src = "images/top_nav_contactus6.jpg";
mouseover_image6 = new Image();
mouseover_image6.src = "images/top_nav_contactus6_over.jpg";

normal_image7 = new Image();
normal_image7.src = "images/top_nav_members7.jpg";
mouseover_image7 = new Image();
mouseover_image7.src = "images/top_nav_members7_over.jpg";

normal_image8 = new Image();
normal_image8.src = "images/top_nav_benefits8.jpg";
mouseover_image8 = new Image();
mouseover_image8.src = "images/top_nav_benefits8_over.jpg";


<!-- repeat the 4 lines above for any subsequent images. -->

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