nav_home = new Image();
nav_home.src = "images/nav_home_on.gif";

nav_individual = new Image();
nav_individual.src = "images/nav_individual_on.gif";

nav_group = new Image();
nav_group.src = "images/nav_group_on.gif";

nav_selfemployed = new Image();
nav_selfemployed.src = "images/nav_self-employed_on.gif";

nav_supplements = new Image();
nav_supplements.src = "images/nav_supplements_on.gif";

nav_life = new Image();
nav_life.src = "images/nav_life_on.gif";

nav_about = new Image();
nav_about.src = "images/nav_about_on.gif";

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