function onMouseOver(obj, n)
    {        
        OnMouse(obj, 'block');
    }

    function onMouseOut(obj)
    {
        OnMouse(obj, 'none');
    }

    function OnMouse(obj, type)
    {
        var ul = obj.getElementsByTagName('ul')[0];
        
        if(ul != null)
            ul.style.display = type;
    }

    try
    {
        var val = 'categoryId';
        
        var objHead = $('li', $('#nav_menu'));
        
        var ignore = false;
        
        for(var i = 0; i < objHead.length; i++)
        {
            if(objHead[i].id != null && objHead[i].id != '')
            {
                var id = objHead[i].id.replace('liBar', '');
                    id = id.replace('P,', '');
                    id = id.replace('N,', '');   
                    
                if(id != '' && id != null)
                {
                    if(val.indexOf(id) != -1)
                    {
                        var name = objHead[i].className; 
                        
                        if(name != null)
                        {
                            objHead[i].className = name + ' activity';
                        }
                        
                        ignore = true;
                        
                        break;
                    }
                }
            }            
        }
        
        if(!ignore)
        {
            if(objHead[0].className != null)
            {
                objHead[0].className = objHead[0].className + ' activity';
            }
        }
    }
    catch(e){}