diff --git a/theme/classic.html b/theme/classic.html
index dafa6c5..a5103cc 100644
--- a/theme/classic.html
+++ b/theme/classic.html
@@ -1326,6 +1326,11 @@
         }
     }
 <!--AliyundriveUploadJsEnd-->
+<!--GoogledriveUploadJsStart-->
+    function preup() {
+        alert("Stop!\nCan not upload form explorer without token.");
+    }
+<!--GoogledriveUploadJsEnd-->
 <!--ListEnd-->
     function operatediv_close(operate) {
         document.getElementById(operate+'_div').style.display='none';