读取radio值

function choose() {
 var emplyid=document.getElementsByName("emplyid");
 if(emplyid.length<=0) {
  alert("<bean:message key='common.alert.choose.many'/>");
  return false;
 }
 var isChecked = false;
 var id = "";
 for (var i=0;i<emplyid.length;i++){
  if(emplyid[i].checked)
  {
   isChecked = true;
   id = emplyid[i].value;
  }
 }

 if(isChecked){
  document.forms[0].action = "chooseEmployee.do?emplyid=" + id;
  document.forms[0].submit();
 }
 else{
  alert("<bean:message key='common.alert.choose.many'/>");
  return false;
 }
}