修改预约课堂 mettingid 错误问题

@@ -33,6 +33,7 @@ class SubscribeApe extends Ape {
         let that = this;
         let _url = ClassDataProxy.locationProtocol + ClassDataProxy.locationProt + '/studentMeeting/addStudentMeeting';
         let status = $(evt.currentTarget).attr('data');
+        let id = $('#lanclassBox').attr('data');
         this.id = id;
         $.ajax({
             type: "POST",