diff --git a/WebContent/Logon.jsp b/WebContent/Logon.jsp
index 5e7c73b00..a7cdda01f 100644
--- a/WebContent/Logon.jsp
+++ b/WebContent/Logon.jsp
@@ -129,7 +129,7 @@ public boolean validUserPassword(HttpServletRequest request, Transaction Sqlca,S
 			StringBuffer sql = new StringBuffer();
 			sql.append("select count(1) num from user_list where userid='");
 			sql.append(sUserID);
-			sql.append("' and endtime is null group by userid");
+			sql.append("' and (endtime is null or endtime = '') group by userid");
 			String num = Sqlca.getString(new SqlObject(sql.toString()));
 			if(null != num){
 				throw new Exception("false");