jQuery Form表单取值的方法

<form method='post' id="punishformID">
      <input hidden="hidden" name="Stu" value=@Model.Stu>
       <input hidden="hidden" name="StuRuleIDs" value=@Model.StuRuleIDs>
    </form>
  </div>
  <div style="margin-top:20px; padding-left:300px;">
    <button type="button" class="w-button w-button-submit" onclick="isagree();">确定</button>
   </button>
  </div>

function isagree() {
  var obj = $('#punishformID').serialize();
  $.ajax({
    type: "POST",
    url: "/Discipline/IsAgree",
    data: obj,// 要提交的表单
    success: function (msg) {
      easyuiAlert(msg);
    },
    error: function (error) {
      easyuiAlert(error);
    }
  });
}