function show_menu(spn)
{
	var submenu = spn.childNodes;
	for (var i=0; i<submenu.length; i++)
	{
		if (submenu[i].className == 'submenu')
		{
			submenu[i].style.display = 'block';
		}
	}
}

function hide_menu(spn)
{
	var submenu = spn.childNodes;
	for (var i=0; i<submenu.length; i++)
	{
		if (submenu[i].className == 'submenu')
		{
			submenu[i].style.display = 'none';
		}
	}
}

function showhide(id)
{
	element = document.getElementById(id);
	if (element.className == 'hide') 
		element.className = 'show';
	else
		element.className = 'hide';
}