Stag - RevolutionSlider navigation change

    var left, right, tpbullets, theclass = 'dark-navigation';
    revapi3.bind('revolution.slide.onloaded', function() {
        left = jQuery('.tp-leftarrow');
        right = jQuery('.tp-rightarrow');
        tpbullets = jQuery('.tp-bullets');
    });

    revapi3.bind('revolution.slide.onchange', function(event, data) {
        var lislide = data.currentslide[0]['className'];
        if(stag_wordinstring(lislide, theclass)) {
            left.addClass(theclass);
            right.addClass(theclass);
            tpbullets.addClass(theclass);
        }
        else {
            left.removeClass(theclass);
            right.removeClass(theclass);
            tpbullets.removeClass(theclass);
        }
    });