document.observe("dom:loaded", function() {

    $$(".hide").each(function(el) {
        el.observe("click", schovat.bindAsEventListener(el,el));
    });

});

function schovat(ev, el) {
    ev.stop();
    var ul = el.next();
    if(el.rel == "open") {
        ul.style.display = "none";
        el.rel = "close";
    } else if(el.rel == "close") {
        ul.style.display = "block";
        el.rel = "open";        
    }
}