// JavaScript Document
	function abre(obj){
		var a = document.getElementById(obj).style.display="block";
	}
	function fecha(obj){
		var a = document.getElementById(obj).style.display="none";
	}
	function aparece(obj, obj2){
		obj.style.backgroundImage=obj2;
	}
	function desaparece(obj, obj2){
		obj.style.backgroundImage=obj2;
	}