var dato;
var img_mas 	= new Image();
img_mas.src = 'images/transparent.gif';
var img_menos 	= new Image();
img_menos.src = 'images/transparent2.gif';

function mostrarSubItem (nro, cant) {	
		var i;
		var abrir = document.getElementById('sub_' + nro).style.visibility != 'visible';
		for (i=1; i<=cant; i++) {	
			//if (i != nro) {
				document.getElementById('sub_' + i).style.visibility = 'hidden';
				document.getElementById('sub_' + i).style.display = 'none';
				document.getElementById('bullet_'+i).src = img_mas.src;		
			//}
		}
		if (abrir) {
			document.getElementById('sub_' + nro).style.visibility = 'visible';
			document.getElementById('sub_' + nro).style.display = 'block';
			document.getElementById('bullet_'+nro).src = img_menos.src;		
		}

function abrirTodo(cant)  {
		for (i=1;i<cant;i++)
		document.getElementById("respuesta_"+i).style.display = "";
}

}