Index: ssts-web/src/test/java/test/forgon/disinfectsystem/selenium/Login.java
===================================================================
diff -u -r20970 -r21509
--- ssts-web/src/test/java/test/forgon/disinfectsystem/selenium/Login.java	(.../Login.java)	(revision 20970)
+++ ssts-web/src/test/java/test/forgon/disinfectsystem/selenium/Login.java	(.../Login.java)	(revision 21509)
@@ -10,11 +10,12 @@
 import org.openqa.selenium.Alert;
 import org.openqa.selenium.By;
 import org.openqa.selenium.NoAlertPresentException;
+import org.openqa.selenium.WebElement;
 import org.openqa.selenium.os.WindowsUtils;
 
 import test.forgon.disinfectsystem.selenium.tools.JSWaiter;
 import test.forgon.disinfectsystem.selenium.tools.Utils;
-
+import static org.testng.Assert.assertNotNull;
 /**
  * Wait<WebDriver> wait = WaitFactory.createDefaultWait();
  * 
@@ -146,8 +147,12 @@
 
 	public void loginAction() {
 		JSWaiter.waitUntilJQueryReady();
-		if (Utils.isFind(Utils.retryingFind(By.id("j_username_display")))) {
-			Utils.retryingFind(By.id("j_username_display")).clear();
+		WebElement usernameElement = Utils.retryingFind(By.id("j_username_display"));
+		
+		assertNotNull(usernameElement);
+		
+		if (Utils.isFind(usernameElement)) {
+			usernameElement.clear();
 			Utils.retryingFindAndClick(By.id("j_username_display"));
 			Utils.retryingFindAndSendKeys(By.id("j_username_display"),
 					Utils.settings.getJSONObject("一级供应室用户").get("工号")