function show_submenu( id, inner_id )
{
	var elem = document.getElementById(id)
	var inner = document.getElementById(inner_id)
	if( elem && inner ){
		if( inner.innerHTML != '' )
			elem.style.display = '';
	}
}

function hide_submenu( id )
{
	var elem = document.getElementById(id)
	if( elem )
		elem.style.display = 'none';
}