var opened_menu;
opened_menu = '';

function open_submenu(id)
{
	var idd = id + '_sub';
	opened_menu = id;
	document.getElementById(idd).style.display = 'block';
	
	idd = id + '_img';
	document.getElementById(idd).src = '../i/blocks/l/menu/arrowtodown.gif';	
}

function close_submenu()
{
	if (opened_menu != '')
	{
	document.getElementById(opened_menu+'_sub').style.display = 'none';
	document.getElementById(opened_menu+'_img').src = '../i/blocks/l/menu/arrowtoright.gif';
	opened_menu = '';
	}
}