//*** This code is copyright 2003 by Gavin Kistner, gavin@refinery.com
//*** It is covered under the license viewable at http://phrogz.net/JS/_ReuseLicense.txt
//*** Reuse or modification is free provided you abide by the terms of that license.
//*** (Including the first two lines above in your source code satisfies the conditions.)

// Find the value of the currently selected radio button in a form by the set's name
function RadioButtonValue(frm,radioName){
	var radios = frm.elements[radioName];
	for (var i=0,len=radios.length;i<len;i++) if (radios[i].checked) return radios[i].value;
	return null;
}

//e.g. <form onsubmit="alert('The value of radio button set named foo is'+RadioButtonValue(this,'foo'))">