diff --git a/main.py b/main.py
index 7ceff18..1c7ac8f 100644
--- a/main.py
+++ b/main.py
@@ -92,8 +92,8 @@ def main(opt):
                 continue
 
             # * run command
-            keep_login_status(driver, login_info)
-            action_agent.run(action_code)
+            if keep_login_status(driver, login_info):
+                action_agent.run(action_code)
 
     except KeyboardInterrupt:
         pass
diff --git a/utils/utils.py b/utils/utils.py
index fbd0016..e94708b 100644
--- a/utils/utils.py
+++ b/utils/utils.py
@@ -8,6 +8,7 @@ if sys.version_info >= (3, 11):
 else:
     import tomli as tomllib
 from selenium import webdriver
+from selenium.common.exceptions import NoAlertPresentException, UnexpectedAlertPresentException
 from selenium.webdriver.common.by import By
 from selenium.webdriver.support.ui import Select
 
@@ -44,7 +45,7 @@ class LoginInfo():
                 "please enter your passwd: ")
 
 
-def keep_login_status(driver: webdriver.Chrome, login_info: LoginInfo):
+def keep_login_status(driver: webdriver.Chrome, login_info: LoginInfo) -> bool:
     # * Close all windows except the main window.
     while len(driver.window_handles) > 1:
         driver.switch_to.window(driver.window_handles[1])
@@ -77,33 +78,55 @@ def keep_login_status(driver: webdriver.Chrome, login_info: LoginInfo):
         # * Press the submit button.
         submit_btn = driver.find_element(By.ID, LOGIN_BUTTON_ID)
         submit_btn.click()
+        time.sleep(1)
 
-        time.sleep(3)
+        # * Check if login failed (alert popup)
+        try:
+            alert = driver.switch_to.alert
+            print(f"Login error message: {alert.text}")
+            alert.accept()
+            return False  # Skip remaining logic, login failed
+        except NoAlertPresentException:
+            pass  # No alert, proceed
+
+        time.sleep(2)
 
-        # * If login has pop a new window, switch main window to the new one.
         login_page_handle = ""
         main_page_handle = ""
 
         for handle in driver.window_handles:
             driver.switch_to.window(handle)
-            if "CHI MotorWeb - " in driver.title:
+            try:
+                title = driver.title
+            except UnexpectedAlertPresentException:
+                try:
+                    alert = driver.switch_to.alert
+                    print(f"Unexpected alert: {alert.text}")
+                    alert.accept()
+                    continue
+                except NoAlertPresentException:
+                    continue
+
+            if "CHI MotorWeb - " in title:
                 main_page_handle = handle
-            elif "CHI MOTOR WEB ERP 登入" in driver.title:
+            elif "CHI MOTOR WEB ERP 登入" in title:
                 login_page_handle = handle
 
-        # * get the page handle that should be stay
-        if main_page_handle:
-            stay_page_handle = main_page_handle
-        elif login_page_handle:
-            stay_page_handle = login_page_handle
-        else:
-            stay_page_handle = top_page
+        stay_page_handle = main_page_handle or login_page_handle or top_page
 
         # * close unnecessary pages
         for handle in driver.window_handles:
             if handle != stay_page_handle:
-                driver.switch_to.window(handle)
-                driver.close()
+                try:
+                    driver.switch_to.window(handle)
+                    driver.close()
+                except Exception as e:
+                    print(f"Error closing window {handle}: {e}")
 
         driver.switch_to.window(stay_page_handle)
         driver.maximize_window()
+
+        return True
+
+    elif "CHI MotorWeb - " in driver.title:
+        return True