jQuery(document).ready(function(){   
    jQuery("li.feed_panel").click(function () {
        var panels = jQuery("div#rss div.box-head ul li");
        var divs = jQuery("div#rss div.box-content div");
        
        for(var i = 0;i < divs.length; i++) {
            var divElement = jQuery('div#rss div.box-content div#'+divs[i].id);
            if (divElement.hasClass("on") == true) {
                divElement.removeClass("on");
                divElement.addClass("off");
            }
            var panelElement = jQuery('div#rss div.box-head ul li#'+panels[i].id);
            if (panelElement.hasClass("on") == true) {
                panelElement.removeClass("on");
                panelElement.addClass("off");
            }
        }

        var idSelected = this.id;
        var keySelected = idSelected.substring(11,idSelected.length);
        jQuery("div#rss div.box-head ul li#feed_panel_"+keySelected).addClass("on").removeClass('off');
        jQuery("div#rss div.box-content div#feed_zone_"+keySelected).addClass("on").removeClass('off');
        return false;
    });
});