var Zakladki = new Class({
    initialize: function(elements)
    {
        var elem = $$(elements);
        var cl = this;
        
        elem.each(function(el)
        {          
            el.addEvent('click', function(){

                Cookie.write('zakladka', el.getProperty('id'));
                $$(".menu_btn").each(function(el){

                el.setProperty('class', 'menu_btn');

                $$('.'+el.getProperty('id')).each(function(ele){
                ele.setStyle('display', 'none');
                ele.setStyle('position', 'fixed');
                });

                });

                this.setProperty('class', 'menu_btn sel');
                var id = this.getProperty('id');
                id = '.'+id;

               $$(id).each(function(el){
                   cl.show(el);
                });
            });
        });

        var zak = Cookie.read("zakladka");
        
        if(zak)
        {
            this.show($$('.'+zak)[0]);            
            $(zak).setProperty('class', 'menu_btn sel');
        }
        else
        {
            var a = $$('.menu_btn')[0];
            var id = a.getProperty('id');

            a.setProperty('class', 'menu_btn sel');
            this.show($$('.'+id)[0]);
            
            //var id = a.getProperty('id');
            
            //this.show();
        //    $(+a.getProperty('id'))[0].setProperty('class', 'menu_btn sel');
        }
    },
    show: function(el)
    {
        el.setStyle('display', 'block');
        el.setStyle('position', 'static');
    }
});