function enable_nav() {
	if(document.all) {
        uls = document.getElementsByTagName('UL');

        for(i = 0; i < uls.length; i++) {
            if(uls[i].className == 'nav_dropdown') {
                var lis = uls[i].getElementsByTagName('li');

                for(i = 0; i < lis.length; i++) {
                    if(lis[i].lastChild.tagName == 'UL' && lis[i].parentNode.className == 'nav_dropdown' && lis[i].className != 'active') {
                        lis[i].onmouseover = function() { this.lastChild.style.display = 'block'; this.style.background = '#000 url(/img/de/menu_item_back_active.gif) no-repeat';}
                        lis[i].onmouseout = function() { this.lastChild.style.display = 'none'; this.style.background = '#00b2dc url(/img/de/menu_item_back.gif) no-repeat';}
                    } else if(lis[i].lastChild.tagName == 'UL' && lis[i].parentNode.className == 'nav_dropdown') {
                        lis[i].onmouseover = function() { this.lastChild.style.display = 'block'; }
                        lis[i].onmouseout = function() { this.lastChild.style.display = 'none'; }
                    }
                }
            }
        }
	}
}