function nshow(id,id2) { 
	document.getElementById(id).style.display = "block"; 
	document.getElementById(id2).style.backgroundPosition = "0 -37px";
}

function nhide(id,id2) { 
	document.getElementById(id).style.display = "none"; 
	document.getElementById(id2).style.backgroundPosition = "0 0px";
}

function showsub(id) { 
	document.getElementById(id).style.display = "block"; 
}

function hidesub(id) { 
	document.getElementById(id).style.display = "none"; 
}