$ektron(document).ready(function(){
    //fields
    var _toc_anchor = $ektron('li > a.expander');
    
    //functions
    function CloseToc(aRef, ulRef)
    {
        ulRef.hide();
        aRef.children('img').attr('src', '/images/plus.gif');
    }
    function OpenToc(aRef, ulRef)
    {
        ulRef.show();
        aRef.children('img').attr('src', '/images/minus.gif');
    }
    _toc_anchor.click(function(){
        var ul = $ektron(this).next().next('ul.expander');
        if(ul.length < 1) return false;
        if(ul.is(':visible'))
        {
            CloseToc($ektron(this), ul);
        }
        else
        {
            OpenToc($ektron(this), ul);
        }
    });
});