function mostrarOcultar(num,capa){
	for(i=0;i<num;i++){
      mo = document.getElementById('invisible'+i);
	  mo.style.display = "none";
	}

	mo = document.getElementById(capa);
	if(mo.style.display==""){
		mo.style.display = "none";
	} else {
		mo.style.display = "";
	}
}
function init(num) {
 for(i=0;i<num;i++){
      mo = document.getElementById('invisible'+i);
	  mo.style.display = "none";
  }
}