diff --git a/frontend/module/instance/js/view.js b/frontend/module/instance/js/view.js
index 45387589..57d39bf7 100644
--- a/frontend/module/instance/js/view.js
+++ b/frontend/module/instance/js/view.js
@@ -108,6 +108,24 @@ $(function()
 
     $('#customBtn').on('click', function(event)
     {
+        var errors = '';
+        $("#customForm").find("input[type=text]").each(function(index, item)
+        {
+            if($(item).val().trim().length == 0)
+            {
+                errors += $(item).attr('placeholder') + instanceNotices.required + '<br/>';
+            }
+        });
+        if(errors.length > 0)
+        {
+            bootbox.alert(
+            {
+                title:   instanceNotices.error,
+                message: errors,
+            });
+            return;
+        }
+
         bootbox.confirm(instanceNotices.confirmCustom, function(result)
         {
             if(!result) return;
diff --git a/frontend/module/instance/lang/zh-cn.php b/frontend/module/instance/lang/zh-cn.php
index 41d55212..1c651f8b 100644
--- a/frontend/module/instance/lang/zh-cn.php
+++ b/frontend/module/instance/lang/zh-cn.php
@@ -201,6 +201,7 @@
 $lang->instance->notices = array();
 $lang->instance->notices['success']            = '成功';
 $lang->instance->notices['fail']               = '失败';
+$lang->instance->notices['error']              = '错误';
 $lang->instance->notices['confirmStart']       = '确定启动该应用吗？';
 $lang->instance->notices['confirmStop']        = '确定关闭该应用吗？';
 $lang->instance->notices['confirmUninstall']   = '确定卸载该应用吗？';
@@ -247,6 +248,7 @@
 $lang->instance->notices['enableSMTPSuccess']  = '启用SMTP成功';
 $lang->instance->notices['disableSMTPSuccess'] = '禁用SMTP成功';
 $lang->instance->notices['confirmCustom']      = '修改自定义配置后请手动重启服务以使配置生效。';
+$lang->instance->notices['required']           = '不能为空';
 
 $lang->instance->nameChangeTo     = ' %s 修改为 %s  。';
 $lang->instance->versionChangeTo  = ' %s 升级为 %s  。';
diff --git a/frontend/module/instance/view/advance.html.php b/frontend/module/instance/view/advance.html.php
index 471561d9..09fa79e5 100644
--- a/frontend/module/instance/view/advance.html.php
+++ b/frontend/module/instance/view/advance.html.php
@@ -40,11 +40,11 @@
         <tr>
           <?php $LDAPInstalled =  $this->system->hasSystemLDAP();?>
           <?php $enableLDAP    =  $instance->ldapSnippetName ? 'true' : '' ;?>
-          <td class='w-100px'><?php echo html::checkbox('enableLDAP', array('true' => $lang->instance->enableLDAP),  $enableLDAP, ($LDAPInstalled ? '' : 'disabled'));?></td>
+          <td class='w-120px'><?php echo html::checkbox('enableLDAP', array('true' => $lang->instance->enableLDAP),  $enableLDAP, ($LDAPInstalled ? '' : 'disabled'));?></td>
           <td colspan='2'>
             <?php if(!$LDAPInstalled):?>
             <?php echo $lang->instance->systemLDAPInactive;?>
-            <?php echo html::a(helper::createLink('system', 'installLDAP'), $lang->instance->toSystemLDAP, '', "class='btn btn-link'");?>
+            <?php echo html::a(helper::createLink('system', 'installLDAP'), $lang->instance->toSystemLDAP, '', "class='btn btn-default'");?>
             <?php endif?>
           </td>
           <td></td>
@@ -71,11 +71,11 @@
         <tr>
           <?php $SMTPInstalled =  $this->system->isSMTPEnabled();?>
           <?php $enableSMTP    =  $instance->smtpSnippetName ? 'true' : '' ;?>
-          <td class='w-100px'><?php echo html::checkbox('enableSMTP', array('true' => $lang->instance->enableSMTP),  $enableSMTP, ($SMTPInstalled ? '' : 'disabled'));?></td>
+          <td class='w-120px'><?php echo html::checkbox('enableSMTP', array('true' => $lang->instance->enableSMTP),  $enableSMTP, ($SMTPInstalled ? '' : 'disabled'));?></td>
           <td colspan='2'>
             <?php if(!$SMTPInstalled):?>
             <?php echo $lang->instance->systemSMTPInactive;?>
-            <?php echo html::a(helper::createLink('system', 'installSMTP'), $lang->instance->toSystemSMTP, '', "class='btn btn-link'");?>
+            <?php echo html::a(helper::createLink('system', 'installSMTP'), $lang->instance->toSystemSMTP, '', "class='btn btn-default'");?>
             <?php endif?>
           </td>
           <td></td>
@@ -103,7 +103,7 @@
         <tr>
           <th><?php echo $item->label;?></th>
           <td>
-            <?php echo html::input($item->name, $item->default, "class='form-control'");?>
+            <?php echo html::input($item->name, $item->default, "class='form-control' placeholder='{$item->label}'");?>
           </td>
           <td></td>
           <td></td>