function showinfo(infonum){
      document.all.region1info.style.visibility='hidden';
      document.all.region2info.style.visibility='hidden';
      document.all.region3info.style.visibility='hidden';
      document.all.region4info.style.visibility='hidden';
      document.all.region5info.style.visibility='hidden';
      document.all.region6info.style.visibility='hidden';
      document.all.region7info.style.visibility='hidden';
      document.all.region8info.style.visibility='hidden';
      document.all.region9info.style.visibility='hidden';
      document.all.region10info.style.visibility='hidden';
      document.all.region11info.style.visibility='hidden';
      document.all.region12info.style.visibility='hidden';
      document.all.region13info.style.visibility='hidden';
      document.all.region14info.style.visibility='hidden';
      document.all.region15info.style.visibility='hidden';
      document.all.region16info.style.visibility='hidden';
      document.all.region17info.style.visibility='hidden';
      document.all.region18info.style.visibility='hidden';
      document.all.region19info.style.visibility='hidden';

      switch(infonum){
         case 1:
            document.all.region1info.style.visibility='visible';
            break;
         case 2:
            document.all.region2info.style.visibility='visible';
            break;
         case 3:
            document.all.region3info.style.visibility='visible';
            break;
         case 4:
            document.all.region4info.style.visibility='visible';
            break;
         case 5:
            document.all.region5info.style.visibility='visible';
            break;
         case 6:
            document.all.region6info.style.visibility='visible';
            break;
         case 7:
            document.all.region7info.style.visibility='visible';
            break;
         case 8:
            document.all.region8info.style.visibility='visible';
            break;
         case 9:
            document.all.region9info.style.visibility='visible';
            break;
         case 10:
            document.all.region10info.style.visibility='visible';
            break;
         case 11:
            document.all.region11info.style.visibility='visible';
            break;
         case 12:
            document.all.region12info.style.visibility='visible';
            break;
         case 13:
            document.all.region13info.style.visibility='visible';
            break;
         case 14:
            document.all.region14info.style.visibility='visible';
            break;
         case 15:
            document.all.region15info.style.visibility='visible';
            break;
         case 16:
            document.all.region16info.style.visibility='visible';
            break;
         case 17:
            document.all.region17info.style.visibility='visible';
            break;
         case 18:
            document.all.region18info.style.visibility='visible';
            break;
         case 19:
            document.all.region19info.style.visibility='visible';
            break;
      }

   }