if (document.images)
{
button_1_up = new Image;
button_1_over = new Image;
button_1_up.src ="images/nav/home-off.jpg";
button_1_over.src ="images/nav/home-on.jpg";

button_2_up = new Image;
button_2_over = new Image;
button_2_up.src ="images/nav/about-us-off.jpg";
button_2_over.src ="images/nav/about-us-on.jpg";

button_3_up = new Image;
button_3_over = new Image;
button_3_up.src ="images/nav/location-off.jpg";
button_3_over.src ="images/nav/location-on.jpg";

button_4_up = new Image;
button_4_over = new Image;
button_4_up.src ="images/nav/products-off.jpg";
button_4_over.src ="images/nav/products-on.jpg";

button_5_up = new Image;
button_5_over = new Image;
button_5_up.src ="images/nav/services-off.jpg";
button_5_over.src ="images/nav/services-on.jpg";

button_6_up = new Image;
button_6_over = new Image;
button_6_up.src ="images/nav/contact-off.jpg";
button_6_over.src ="images/nav/contact-on.jpg";

}
else

{

button_1_up = "";
button_2_up = "";
button_3_up = "";
button_4_up = "";
button_5_up = "";
button_6_up = "";

button_1_over = "";
button_2_over = "";
button_3_over = "";
button_4_over = "";
button_5_over = "";
button_6_over = "";

document.one = "";
document.two = "";
document.three = "";
document.four = "";
document.five = "";
document.six = "";

}