function treemenu_f(id1)
{
	var linkelement = document.getElementById(id1+"_a");
	var bodyelement = document.getElementById(id1+"_body");
	
	if (bodyelement.style.display == "none") {
		bodyelement.style.display = "";
		linkelement.innerHTML = '¡Ý';
	} else {
		bodyelement.style.display = "none";
		linkelement.innerHTML = '¡Ü';
	}
}