js 父页中的单选按钮取值

  int starvalue = 3;

  ContentPlaceHolder ch = (ContentPlaceHolder)Master.FindControl("middlecontent");

  RadioButton radio = new RadioButton();

  for (int i = 1; i <= 5;i++ )

  {

  radio = (RadioButton)ch.FindControl("rblStar" + i);

  if (radio.Checked == true)

  {

  starvalue = i;

  break;

  }

  }

  MessageBox.Show(starvalue.ToString());