<s:radio    name="isCharge" id="isCharge" list="#{'Y':'是','N':'否'}"

        listKey="key" listValue="value" value="'Y'" οnchange="status();" />

<script type="text/javascript">

  function status() {       var h=document.getElementsByName('isCharge')[0].checked;                 if(h==false) {           document.getElementById("songPrice").value=""           document.getElementById("songPrice").disabled=false;       }else {           document.getElementById("songPrice").disabled=true;       }       } </script>