menu_status = new Array();
function setTertiaryNavState(id){
    if (document.getElementById) {
        var topId = "top" + id;
        var subId = "sub" + id;

        var top = document.getElementById(topId);
        var sub = document.getElementById(subId);
        
        if (top != null) { // does top level exist?
            if (sub != null) { // does sub level exist?
                if (top.className != 'tertMenu_Arrow_on') {
                   top.className = 'tertMenu_Arrow_on';
                } else {
                   top.className = 'tertMenu_Arrow';
                }
                
                if (menu_status[subId] != 'show') {
                   sub.className = 'show';
                   menu_status[subId] = 'show';
                } else {
                   sub.className = 'hide';
                   menu_status[subId] = 'hide';
                }
            } else { // No submenu
                if (top.className != 'tertMenu_on') {
                   top.className = 'tertMenu_on';
                } else {
                   top.className = 'tertMenu';
                }
            }
        }
    }
}