function display_change(x){
	if(document.getElementById('capa'+x).style.display != "block"){
		document.getElementById('capa'+x).style.display = "block";
	}else{
		document.getElementById('capa'+x).style.display = "none";
	}
}
function mostrar(x,n){
	for ( i = 1; i < n+1 ; i++ ){
        if(i == x){
            document.getElementById('capa'+i).style.display = "block";
        }else{
            document.getElementById('capa'+i).style.display = "none";
        }
    }
}