// Initialize fields at load
if (getRadioValue(document.getElementsByName('refund_type')) == "partial") {
	document.getElementById("refund_amount").disabled = false;
}

function getRadioValue(elem) {
  for (var i = 0; i < elem.length; i++) {
    if (elem[i].checked) {
      return elem[i].value;
    }
  }
  return "";
}

function enableField(field) {
	var theField = document.getElementById(field);

	theField.disabled = false;
	theField.focus();
}

function disableField(field) {
	var theField = document.getElementById(field);

	theField.disabled = true;
	//theField.value = '';
}