if(document.images) {

mhbc_nav_home_on = new Image;
mhbc_nav_home_off = new Image;
mhbc_nav_events_on = new Image;
mhbc_nav_events_off = new Image;
mhbc_nav_links_on = new Image;
mhbc_nav_links_off = new Image;
mhbc_nav_serv_on = new Image;
mhbc_nav_serv_off = new Image;
mhbc_nav_sites_on = new Image;
mhbc_nav_sites_off = new Image;
mhbc_nav_board_on = new Image;
mhbc_nav_board_off = new Image;

mhbc_nav_home_on.src = "../image/mhbc_nav_home_on.gif";
mhbc_nav_home_off.src = "../image/mhbc_nav_home_off.gif";
mhbc_nav_events_on.src = "../image/mhbc_nav_events_on.gif";
mhbc_nav_events_off.src = "../image/mhbc_nav_events_off.gif";
mhbc_nav_links_on.src = "../image/mhbc_nav_links_on.gif";
mhbc_nav_links_off.src = "../image/mhbc_nav_links_off.gif";
mhbc_nav_serv_on.src = "../image/mhbc_nav_serv_on.gif";
mhbc_nav_serv_off.src = "../image/mhbc_nav_serv_off.gif";
mhbc_nav_sites_on.src = "../image/mhbc_nav_sites_on.gif";
mhbc_nav_sites_off.src = "../image/mhbc_nav_sites_off.gif";
mhbc_nav_board_on.src = "../image/mhbc_nav_board_on.gif";
mhbc_nav_board_off.src = "../image/mhbc_nav_board_off.gif";
}

function swapImage(f,n) {
  f = "document."+f;
  f = eval(f);
  n = eval(n);
  f.src = n.src;
}