update

js/Desktop/DeskTop.js

@@ -3213,6 +3213,9 @@ window.addEventListener('message', function (e) { // 监听 message 事件
     }else if (e.data.tools && e.data.tools == "loginSz") {
         U.MD.D.I.openInApplication("loginSz")
     }else if (e.data.tools && e.data.tools == "classroom_observation_board"){
+        if($('#classroom_observation_board')){
+            U.UF.F.closeWindow($('#classroom_observation_board'))
+        }
         U.MD.D.I.openInApplication("classroom_observation_board", e.data.type)
     }