Capturing Form Reset

I've got a form that is enabling/disabling other fields based upon radio selections. I've got it all working, except with the form reset button. My "refresh" routine just iterates through the radio box to check which item is selected based upon e[i].checked state and enables/disables accordingly. Unfortunately it seems the reset event fires before the actual state of e[i] has been reset and my form enabing/disabling gets out of sync.

var btn = document.getElementById('formData');
formValidation.addEvent(btn, 'reset', formValidation.refreshUI, false);

refreshUI: function() {
var e = document.getElementsByTagName('input');
for (var i=0; i<e.length; i++) {
if (e[i].type == 'radio' && e[i].name == 'ipType' && e[i].id == 'ipStatic' && e[i].checked == true) {
document.getElementById('ipHost').disabled = false;
document.getElementById('ipAddress').disabled = false;
document.getElementById('ipMask').disabled = false;
document.getElementById('ipGateway').disabled = false;
break;
}
else if (e[i].type == 'radio' && e[i].name == 'ipType' && e[i].id == 'ipStatic' && e[i].checked == false) {
document.getElementById('ipHost').disabled = false;
document.getElementById('ipAddress').disabled = true;
document.getElementById('ipMask').disabled = true;
document.getElementById('ipGateway').disabled = false;
break;
}
}
}