// preload images

// top images
nav_home_on = new Image();
nav_home_on.src="/display_images/positive_support/nav_home_on.gif";
nav_home_off = new Image();
nav_home_off.src="/display_images/positive_support/nav_home_off.gif";

nav_parents_on = new Image();
nav_parents_on.src="/display_images/positive_support/nav_parents_on.gif";
nav_parents_off = new Image();
nav_parents_off.src="/display_images/positive_support/nav_parents_off.gif";

nav_part_profs_on = new Image();
nav_part_profs_on.src="/display_images/positive_support/nav_part_profs_on.gif";
nav_part_profs_off = new Image();
nav_part_profs_off.src="/display_images/positive_support/nav_part_profs_off.gif";

nav_other_profs_on = new Image();
nav_other_profs_on.src="/display_images/positive_support/nav_other_profs_on.gif";
nav_other_profs_off = new Image();
nav_other_profs_off.src="/display_images/positive_support/nav_other_profs_off.gif";

nav_gen_interest_on = new Image();
nav_gen_interest_on.src="/display_images/positive_support/nav_gen_interest_on.gif";
nav_gen_interest_off = new Image();
nav_gen_interest_off.src="/display_images/positive_support/nav_gen_interest_off.gif";