function noneSelected(radioSet) {
	if (radioSet == null) return false;
	var i = 0;
	if (typeof radioSet[i] != "object") { //If there is only one radio button
		if (radioSet.checked == true)
			return false;
		else
			return true;
	}
	while (radioSet[i] != null) {
		if (radioSet[i].checked == true) return false;
		i++;
	}
	return true;
}

function clearRadioSet(radioSet) {
	if (radioSet == null) return;
	var i = 0;
	if (radioSet[0] == null) radioSet.checked = false;
	while (radioSet[i] != null) {
		radioSet[i].checked = false;
		i++
	}
}

function getRadioSetValue(radioSet) {
	if (radioSet == null) return "";
	var i = 0;
	if (typeof radioSet[i] != "object") { //If there is only one radio button
		if (radioSet.checked == true)
			return radioSet.value;
		else
			return "";
	}
	while (radioSet[i] != null) {
		if (radioSet[i].checked == true)
			return radioSet[i].value;
		i++
	}
}

function setRadioSet(radioSet, preSel) {
	if (radioSet == null) return;
	clearRadioSet(radioSet);
	var i = 0;
	while (typeof radioSet[i] == "object") {
		if (radioSet[i].value == preSel) {
			radioSet[i].checked = true;
			return;
		}
		i++;
	}
	if (typeof radioSet[0] == "object") {
    var i = 0;
    while (typeof radioSet[i] == "object") {
      if (!radioSet[i].disabled) { 
        radioSet[i].checked = true; 
        return;
      }
      i++;
    }
	} else  {
		radioSet.checked = true;
	}
}

function getRadioSetIndex(radioSet) {
	if (radioSet == null) return;
	var i = 0;
	if (typeof radioSet[i] != "object") { //If there is only one radio button
		if (radioSet.checked == true)
			return 0;
		else
			return "";
	}
	while (radioSet[i] != null) {
		if (radioSet[i].checked == true)
			return i;
		i++
	}
}

function disableRadioSet(radioSet) {
	if (radioSet == null) return;
	var i = 0;
	if (typeof radioSet[i] != "object") { //If there is only one radio button
       radioSet.disabled = true;
       return;
	}
	while (radioSet[i] != null) {
		radioSet[i].disabled = true;
		i++
	}
}

function enableRadioSet(radioSet) {
	if (radioSet == null) return;
	var i = 0;
	if (typeof radioSet[i] != "object") { //If there is only one radio button
       radioSet.disabled = false;
       return;
	}
	while (radioSet[i] != null) {
		radioSet[i].disabled = false;
		i++
	}
}