function $(id) {
  return document.getElementById(id);
}

function too(s){
	//alert(s);
	if (opened>0){
		if (s!=opened){
			$('y'+opened).style.display="none";
		}
	}
	if (s!=opened){
		$('y'+s).style.display="";
		opened=s;
	}else{
		
		//opened=-1;
	}

}