// return the value of the radio button that is checked

// return an empty string if none are checked, or

// there are no radio buttons

function radioGetCheckedValue(radioObj) {

	if(!radioObj)

		return "";



	// alert('radioGetCheckedValue : radioObj not null');



	var radioLength = radioObj.length;



	// alert('radioGetCheckedValue : radioObj.length = '+radioLength);



	if(radioLength == undefined){

		if(radioObj.checked)

			return radioObj.value;

		else

			return "";

	}



	// alert('radioGetCheckedValue : radioObj has length');



	for(var i = 0; i < radioLength; i++) {

		if(radioObj[i].checked) {

			return radioObj[i].value;

		}

	}



	// alert('radioGetCheckedValue : returning blank');



	return "";

}



// set the radio button with the given value as being checked

// do nothing if there are no radio buttons

// if the given value does not exist, all the radio buttons

// are reset to unchecked

function radioSetCheckedValue(radioObj, newValue) {

	if(!radioObj)

		return;



	var radioLength = radioObj.length;

	if(radioLength == undefined) {

		radioObj.checked = (radioObj.value == newValue.toString());

		return;

	}



	for(var i = 0; i < radioLength; i++) {

		radioObj[i].checked = false;

		if(radioObj[i].value == newValue.toString()) {

			radioObj[i].checked = true;

		}

	}

}