image1True = new Image
image1True.src = "Graphics/btn_home_over.jpg"

image1False = new Image
image1False.src = "Graphics/btn_home.jpg"

image2True = new Image
image2True.src = "Graphics/btn_about_over.jpg"

image2False = new Image
image2False.src = "Graphics/btn_about.jpg"

image3True = new Image
image3True.src = "Graphics/btn_products_over.jpg"

image3False = new Image
image3False.src = "Graphics/btn_products.jpg"

image4True = new Image
image4True.src = "Graphics/btn_contact_over.jpg"

image4False = new Image
image4False.src = "Graphics/btn_contact.jpg"


function switchImage(imageName, mousePosition) {
  imgToAlter = eval(imageName + mousePosition + ".src");
  document.images[imageName].src = imgToAlter;
}