function doClick_down(o){
	 o.className="yes";
	 var j;
	 var id;
	 var e;
	 for(var i=1;i<=7;i++){
	   id ="down"+i;
	   j = document.getElementById(id);
	   e = document.getElementById("d_con"+i);
	   if(id != o.id){
	   	 j.className="";
	   	 e.style.display = "none";
	   }else{
		e.style.display = "block";
	   }
	 }
}