$(function() {
    if (typeof(nav_id) != 'undefined') {navigation();}
});

function navigation() {
    $('#nav-'+nav_id+' li').each(function(index) {
        if ($(this).attr('id')=='tb-'+nav_selected) {
            if (index==0) {$('<span class="tb first-on"></span>').prependTo(this);}
            $(this).find('a').addClass('bg-on');
            if ($(this).hasClass('last')) {$('<span class="tb last-on"></span>').appendTo(this);} else {$('<span class="tb aa medium-left-on-right-off"></span>').appendTo(this);}
            $('#nav-'+nav_id+' li:eq('+(index-1)+') span.bb').removeClass('medium-left-off-right-off').addClass('medium-left-off-right-on');
        } else {
            if (index==0) {$('<span class="tb first-off"></span>').prependTo(this);}
            $(this).find('a').addClass('bg-off');
            if ($(this).hasClass('last')) {$('<span class="tb last-off"></span>').appendTo(this);} else {$('<span class="tb bb medium-left-off-right-off"></span>').appendTo(this);}
        }
        if ($(this).hasClass('last')) {return false;}
    });
}