image1 = new Image();
image1.src = "images/nav/about_us_over.gif";

image2 = new Image();
image2.src = "images/nav/about_us_on.gif";

image3 = new Image();
image3.src = "images/services_over.gif";

image4 = new Image();
image4.src = "images/services_on.gif";

image5 = new Image();
image5.src = "images/portfolio_over.gif";

image6 = new Image();
image6.src = "images/portfolio_on.gif";

image7 = new Image();
image7.src = "images/nav/customers_over.gif";

image8 = new Image();
image8.src = "images/nav/customers_on.gif";

image9 = new Image();
image9.src = "images/contact_over.gif";

image10 = new Image();
image10.src = "images/contact_on.gif";