function getRadioVal(r) {
  var str = '';
  for(i=0;i<r.length;i++) {
    str += r[i].checked;
    if (i < (r.length - 1)) {
      str += ',';
    }
  }
  return str;
}

function setAllChecked(r, val) {
  for(i=0;i<r.length;i++) {
    r[i].checked = val;
  }
}

function addNewRadio() {
  var radio = document.createElement("INPUT");
  radio.type = 'radio';
  radio.name = document.mainform.addname.value;
  radio.checked = document.mainform.addchecked.checked;
  var b = document.getElementById("addbeforeme");
  b.parentNode.insertBefore(radio, b);
}