var submenu_items = new Array();
submenu_items[0] = 'submenu_portfolio';
submenu_items[1] = 'submenu_label';
submenu_items[2] = 'submenu_about';

function hideAll()
{
	for(var i=0;i<submenu_items.length;i++)
	{
		var item = document.getElementById(submenu_items[i]);
		item.style.display = 'none';
	}
}

function showItem(itemID)
{
	hideAll();
	var item = document.getElementById(itemID);
	item.style.display = '';
	return false;
}