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 = document.getElementById('aa_'+act_menu);
			if (act) act.className = "nonactive";
			
			var act_img = document.getElementById('img_'+act_menu);
			if (act_img) act_img.style.display='inline';
			
			var act_sub = document.getElementById('menu_'+act_menu);
			if (act_sub) act_sub.style.display='none';
		}
		
		act_menu = id;
		
		if (nr==0)
			document.getElementById('aa_' + id ).className = "active" ;
		else
			document.getElementById('aa_' + id ).className = "active2" ;
		
		document.getElementById('img_' + id ).style.display = "none" ;
	}
	else
	{
		a.style.display = 'none';
	}
}