var opened="";

function menu_l_open(data){
if (opened!="") {
	document.getElementById(opened).style.display='none';
	document.getElementById("tit_"+opened).className="";
}
if (document.getElementById(data)) {
	 document.getElementById(data).style.display='block';
	 document.getElementById("tit_"+data).className="opened_active";
	 opened=data;
}
}