img1 = new Image();
img1.src = "images/home2.jpg"
img2 = new Image();
img2.src = "images/about-us2.jpg"
img3 = new Image();
img3.src = "images/contact-us2.jpg"
img4 = new Image();
img4.src = "images/customer-service2.jpg"

function swap(image, changeto)
{ document.images[image].src = changeto;}