imgs_on = new Array;
imgs_off = new Array;

imgs_on[1] = new Image; imgs_on[1].src = "images/top_nav_home_on.gif";
imgs_off[1] = new Image; imgs_off[1].src = "images/top_nav_home_off.gif";

imgs_on[2] = new Image; imgs_on[2].src = "images/top_nav_about_on.gif";
imgs_off[2] = new Image; imgs_off[2].src = "images/top_nav_about_off.gif";

imgs_on[3] = new Image; imgs_on[3].src = "images/top_nav_products_on.gif";
imgs_off[3] = new Image; imgs_off[3].src = "images/top_nav_products_off.gif";

imgs_on[4] = new Image; imgs_on[4].src = "images/top_nav_wholesale_on.gif";
imgs_off[4] = new Image; imgs_off[4].src = "images/top_nav_wholesale_off.gif";

imgs_on[5] = new Image; imgs_on[5].src = "images/top_nav_press_on.gif";
imgs_off[5] = new Image; imgs_off[5].src = "images/top_nav_press_off.gif";

imgs_on[6] = new Image; imgs_on[6].src = "images/top_nav_contact_on.gif";
imgs_off[6] = new Image; imgs_off[6].src = "images/top_nav_contact_off.gif";

function on(imgName, imgNum) {
 document[imgName].src = imgs_on[imgNum].src;
}
function off(imgName, imgNum) {
 document[imgName].src = imgs_off[imgNum].src;
}