function showRdr(sn) {
 var rdr = 0;
 while(1) {
  var sect = document.getElementById(sn+rdr);
  if(sect==null || typeof(sect)=='undefined')break;
  sect.style.display='block';
  rdr++;
 }
 sect = document.getElementById(sn+'lnk');
 sect.style.display='none';
}
function ordSelect(mod) {
 var sect = document.getElementById(mod.name+mod.value);
 if(sect==null || typeof(sect)=='undefined')return;
 var sn = 1;
 while(1) {
  var sect = document.getElementById(mod.name+sn);
  if(sect==null || typeof(sect)=='undefined')break;
  if(sn==mod.value)
   sect.style.display='block';
  else
   sect.style.display='none';
  sn++;
 }
}