function block(id,modifier){
 	if(document.getElementById(id).style.display=="none"){
		document.getElementById(modifier).innerHTML = "Ocultar...";
 		document.getElementById(id).style.display = "block";
	}
	else{
		document.getElementById(id).style.display = "none";
		document.getElementById(modifier).innerHTML = "Leer más...";
	}
 }