// JavaScript Document

{
img1 = new Image();
img1.src = "images/btn-home.jpg";
ovr1 = new Image();
ovr1.src = "images/btn-home-over.jpg";

img2 = new Image();
img2.src = "images/btn-features.jpg";
ovr2 = new Image();
ovr2.src = "images/btn-features-over.jpg";

img3 = new Image();
img3.src = "images/btn-signup.jpg";
ovr3 = new Image();
ovr3.src = "images/btn-signup-over.jpg";

img4 = new Image();
img4.src = "images/btn-login.jpg";
ovr4 = new Image();
ovr4.src = "images/btn-login-over.jpg";
}
function imageChange(imageID,imageName){ 

{
document.images[imageID].src = eval(imageName + ".src");
}
}