<!--
function change(id,name,co){
  for(i=1;i<=co;i++){
   class_name=name+i;
   class_name2=name+"_"+i;
   if (id==i){
    document.getElementById(class_name).style.display="block";
    document.getElementById(class_name2).className=name+"_yes";
   }else{
    document.getElementById(class_name).style.display="none";
    document.getElementById(class_name2).className=name+"_no";
   }
  }
 }
//-->