nav_who = new Image();
nav_who.src = "images/nav_who_on.gif";

nav_manufacturing = new Image();
nav_manufacturing.src = "images/nav_manufacturing_on.gif";

nav_store = new Image();
nav_store.src = "images/nav_store_on.gif";

nav_industrial = new Image();
nav_industrial.src = "images/nav_industrial_on.gif";

nav_research = new Image();
nav_research.src = "images/nav_research_on.gif";

nav_international = new Image();
nav_international.src = "images/nav_international_on.gif";

nav_careers = new Image();
nav_careers.src = "images/nav_careers_on.gif";

nav_contact = new Image();
nav_contact.src = "images/nav_contact_on.gif";