function submenu(elid)
{
	var el=document.getElementById('menu'+elid);
	el1=document.getElementById('l'+elid);
	if(el.style['display']=='none')
	{
		el.style['display']='';
		el1.innerHTML='▼';
	}
	else
	{
		el.style['display']='none';
		el1.innerHTML='►';
	}
	
}