function doClick(o){
	 o.className="Meun_On";
	 var j;
	 var id;
	 var b;
	 for(var i=1;i<=2;i++){
	   id ="bb"+i;
	   j = document.getElementById(id);
	   b = document.getElementById("C"+i);
	   if(id != o.id){
	   	 j.className="Meun_Off";
	   	 if(b) b.style.display = "none";
	   }else{
		 if(b) b.style.display = "block";
	   }
	 }
}