diff --git a/theme/classic.html b/theme/classic.html
index 4b6d702..e9747d5 100644
--- a/theme/classic.html
+++ b/theme/classic.html
@@ -479,8 +479,7 @@
 <!--MdRequireStart--><link rel="stylesheet" href="//unpkg.zhimg.com/github-markdown-css@3.0.1/github-markdown.css">
 <script type="text/javascript" src="//unpkg.zhimg.com/marked@0.6.2/marked.min.js"></script><!--MdRequireEnd-->
 <!--GuestUploadStart--><script type="text/javascript" src="//cdn.bootcss.com/spark-md5/3.0.0/spark-md5.min.js"></script><!--GuestUploadEnd-->
-<!--LoginStart--><script src="https://cdn.bootcdn.net/ajax/libs/js-sha1/0.6.0/sha1.min.js"></script><!--LoginEnd-->
-<!--AliyundriveUploadJsStart--><script src="https://cdn.bootcdn.net/ajax/libs/js-sha1/0.6.0/sha1.min.js"></script><!--AliyundriveUploadJsEnd-->
+<!--AliyundriveUploadJsStart--><script src="https://cdn.bootcss.com/js-sha1/0.6.0/sha1.min.js"></script><!--AliyundriveUploadJsEnd-->
 <!--IsFileStart--><!--IspdfFileStart--><script src="//cdn.bootcss.com/pdf.js/2.3.200/pdf.min.js"></script><!--IspdfFileEnd--><!--IsFileEnd-->
 <!--ListEnd-->
 <script type="text/javascript">
@@ -493,6 +492,30 @@
         document.cookie='language='+str+'; path=/; '+expires;
         location.href = location.href;
     }
+<!--LoginStart-->
+    function login() {
+        document.getElementById('mask').style.display='';
+            //document.getElementById('mask').style.width=document.documentElement.scrollWidth+'px';
+        document.getElementById('mask').style.height=document.documentElement.scrollHeight<window.innerHeight?window.innerHeight:document.documentElement.scrollHeight+'px';
+        document.getElementById('login_div').style.display='';
+        document.getElementById('login_div').style.left=(document.body.clientWidth-document.getElementById('login_div').offsetWidth)/2 +'px';
+        document.getElementById('login_div').style.top=(window.innerHeight-document.getElementById('login_div').offsetHeight)/2+document.body.scrollTop +'px';
+        document.getElementById('login_input').focus();
+    }
+    function sha1loginpass(f) {
+        if (f.password1.value=="") return false;
+        try {
+            timestamp = new Date().getTime() + "";
+            timestamp = timestamp.substr(0, timestamp.length-3);
+            f.timestamp.value = timestamp;
+            f.password1.value = sha1(timestamp + "" + f.password1.value);
+            return true;
+        } catch {
+            alert("sha1.js not loaded.");
+            return false;
+        }
+    }
+<!--LoginEnd-->
 <!--ListStart-->
 
 <!--IsFileStart-->
@@ -1518,29 +1541,11 @@
     }
 <!--IsFolderEnd-->
 <!--AdminEnd-->
-<!--LoginStart-->
-    function login() {
-        document.getElementById('mask').style.display='';
-            //document.getElementById('mask').style.width=document.documentElement.scrollWidth+'px';
-        document.getElementById('mask').style.height=document.documentElement.scrollHeight<window.innerHeight?window.innerHeight:document.documentElement.scrollHeight+'px';
-        document.getElementById('login_div').style.display='';
-        document.getElementById('login_div').style.left=(document.body.clientWidth-document.getElementById('login_div').offsetWidth)/2 +'px';
-        document.getElementById('login_div').style.top=(window.innerHeight-document.getElementById('login_div').offsetHeight)/2+document.body.scrollTop +'px';
-        document.getElementById('login_input').focus();
-    }
-    function sha1loginpass(f) {
-        if (f.password1.value=="") return false;
-        timestamp = new Date().getTime() + "";
-        timestamp = timestamp.substr(0, timestamp.length-3);
-        f.timestamp.value = timestamp;
-        f.password1.value = sha1(timestamp + "" + f.password1.value);
-        return true;
-    }
-<!--LoginEnd-->
 <!--EncryptedStart-->
     document.getElementById('password1').focus();
 <!--EncryptedEnd-->
 </script>
 <script src="//unpkg.zhimg.com/ionicons@4.4.4/dist/ionicons.js"></script>
+<!--LoginStart--><script src="https://cdn.bootcss.com/js-sha1/0.6.0/sha1.min.js"></script><!--LoginEnd-->
 <!--customScript-->
 </html>