<!--
var selectedsubmenu      = 0;

// open hidden layer
function opensubmenu(id)
{	
	// close active submennu
	if (selectedsubmenu) selectedsubmenu.style.visibility = 'hidden';

	// show the selected submenu
	selectedsubmenu = document.getElementById(id);
	selectedsubmenu.style.visibility = 'visible';

}
// close active submenur
function closesubmenu()
{
	if (selectedsubmenu) selectedsubmenu.style.visibility = 'hidden';
}

// close layer when click-out
document.onclick = closesubmenu; 
// -->