diff --git a/theme/classic.php b/theme/classic.php
index 67ad6f6..4cde6ad 100644
--- a/theme/classic.php
+++ b/theme/classic.php
@@ -945,7 +945,7 @@
 <?php }
     if ($_SERVER['admin']) { // admin login. 管理登录后 ?>
     function logout() {
-        document.cookie = "<?php echo $_SERVER['function_name'] . 'admin';?>=; path=/";
+        document.cookie = "admin=; path=/";
         location.href = location.href;
     }
     function enableedit(obj) {