function menu_exp(id, nr)
{
	var a = document.getElementById('menu_' + id);
    
	if (a.style.display=='none')
	{
		a.style.display = '';
		
		if (act_menu != id)
		{
			var act_sub = document.getElementById('menu_'+act_menu);
			if (act_sub) act_sub.style.display='none';
			
			var act = document.getElementById('aa_'+act_menu);
			if (act)
			{
				if (act_nr==0)
					act.className = "p_meniu";
				else
					act.className = "meniu";
			}
			var act_img = document.getElementById('img_'+act_menu);
			if (act_img) act_img.src = _base+"images/meniu_bulet.gif";
			
			var nact = document.getElementById('aa_' + id );
			if (nact)
			{
				if (nr==0)
					document.getElementById('aa_' + id ).className = "p_meniu_a";
				else
					document.getElementById('aa_' + id ).className = "meniu_a";
			}
			var nact_img = document.getElementById('img_'+id);
			if (nact_img) nact_img.src = _base+"images/meniu_bulet_a.gif";
			
			act_menu = id;
			act_nr = nr;
		}
	}
	else
	{
		a.style.display = 'none';
	}
}