function showhide(id){
	if (document.getElementById){
		obj = document.getElementById(id);
		if (obj.style.display == "none"){
			obj.style.display = "block";
		} else {
			obj.style.display = "none";
		}
	}
}

function ar_dir(id){
	if (document.getElementById){
		obj = document.getElementById(id);
		if (obj.src == "sag.gif"){
			obj.src = "sag.gif";
		} else {
			obj.src = "sol.gif";
		}
	}
}

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

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