diff --git a/app/views/projects/invite_members_by_mail.html.erb b/app/views/projects/invite_members_by_mail.html.erb
index a697b70a4..32a124078 100644
--- a/app/views/projects/invite_members_by_mail.html.erb
+++ b/app/views/projects/invite_members_by_mail.html.erb
@@ -44,11 +44,11 @@
 
     }
 
-    function verifyFirstName() {
-        var first_name = $.trim($('#first_name').val());
-        if(first_name.length > 30)
+    function verifyLastName() {
+        var last_name = $.trim($('#last_name').val());
+        if(last_name.length > 30)
         {
-            $("#valid_email").text("用户名字过长,最长为30个字符");
+            $("#valid_email").text("用户姓氏过长,最长为30个字符");
             return false;
         }
         else
@@ -59,11 +59,11 @@
 
     }
 
-    function verifyLastName() {
-        var last_name = $.trim($('#last_name').val());
-        if(last_name.length > 30)
+    function verifyFirstName() {
+        var first_name = $.trim($('#first_name').val());
+        if(first_name.length > 30)
         {
-            $("#valid_email").text("用户姓氏过长,最长为30个字符");
+            $("#valid_email").text("用户名字过长,最长为30个字符");
             return false;
         }
         else
@@ -76,7 +76,7 @@
 
     function senderEmail(obj)
     {
-        if(verifyAddress())
+        if(verifyAddress() && verifyFirstName()  && verifyLastName() )
         {
             obj.parent().submit();
         }
@@ -110,13 +110,13 @@
           <%= text_field_tag 'mail',  '', :class => "fb_item fl", :placeholder => l(:label_input_email), :onkeyup => "this.value=this.value.replace(' ','')", :style => "ime-mode:disabled;", :onblur => "verifyAddress(this);" %>
         </li>
         <li>
-          <%= text_field_tag 'first_name',  '', :class => "fb_item_first_name fl", :placeholder => l(:label_input_email_lastname), :onkeyup => "this.value=this.value.replace(' ','')", :style => "ime-mode:disabled;", :onblur => "verifyLastName(this);" %>
+          <%= text_field_tag 'last_name',  '', :class => "fb_item_first_name fl", :placeholder => l(:label_input_email_lastname), :onkeyup => "this.value=this.value.replace(' ','')", :style => "ime-mode:disabled;", :onblur => "verifyLastName(this);" %>
         </li>
         <li>
-          <%= text_field_tag 'last_name',  '', :class => "fb_item_last_name fl", :placeholder => l(:label_input_email_firstname), :onkeyup => "this.value=this.value.replace(' ','')", :style => "ime-mode:disabled;", :onblur => "verifyFirstName(this);" %>
+          <%= text_field_tag 'first_name',  '', :class => "fb_item_last_name fl", :placeholder => l(:label_input_email_firstname), :onkeyup => "this.value=this.value.replace(' ','')", :style => "ime-mode:disabled;", :onblur => "verifyFirstName(this);" %>
         </li>
         <li>
-          <select class="fb_item_gender fl"  id="gender" name="gender"><option value="0">男</option><option value="1">女</option></select>
+          <select class="fb_item_gender fl"  id="gender" name="gender"><option value="">性别</option><option value="0">男</option><option value="1">女</option></select>
         </li>
       </ul>
       <div class="cl"></div>
diff --git a/config/locales/zh.yml b/config/locales/zh.yml
index 195526712..5efe4a2cc 100644
--- a/config/locales/zh.yml
+++ b/config/locales/zh.yml
@@ -2025,8 +2025,8 @@ zh:
   label_end_time: 截止时间
   label_send_email: 确定发送
   label_input_email: 请输入邮箱地址(必填)
-  label_input_email_firstname: 请输入用户名字(非必填)
-  label_input_email_lastname: 请输入用户姓氏(非必填)
+  label_input_email_firstname: 请输入用户名字(可选)
+  label_input_email_lastname: 请输入用户姓氏(可选)
   label_input_email_gender: 请输入用户性别
 
   #api end
diff --git a/public/stylesheets/project.css b/public/stylesheets/project.css
index 0a78b399b..e044f9d51 100644
--- a/public/stylesheets/project.css
+++ b/public/stylesheets/project.css
@@ -47,7 +47,7 @@ a:hover.box_close{background:url(../images/img_floatbox.png) -22px 0 no-repeat;}
 .fb_item{ color:#919191; border:1px solid #919191; height:28px; margin-bottom:5px; padding-left:5px; width:200px;}
 .fb_item_first_name{ color:#919191; border:1px solid #919191; height:28px; margin-bottom:5px; padding-left:5px; width:150px;margin-left: 10px;}
 .fb_item_last_name{ color:#919191; border:1px solid #919191; height:28px; margin-bottom:5px; padding-left:5px; width:150px;margin-left: 10px;}
-.fb_item_gender{ color:#919191; border:1px solid #919191; height:29px; margin-bottom:5px; padding-left:5px; width:48px;margin-left: 10px;}
+.fb_item_gender{ color:#919191; border:1px solid #919191; height:29px; margin-bottom:5px; padding-left:5px; width:58px;margin-left: 10px;}
 a.icon_addm{ background:url(../images/img_floatbox.png) 0 -33px no-repeat; width:16px; height:16px; display:block;  margin:5px 0 0 5px;}
 a:hover.icon_addm{background:url(../images/img_floatbox.png) 0 -61px no-repeat; }
 a.icon_removem{ background:url(../images/img_floatbox.png) -22px -33px  no-repeat;width:16px; height:16px; display:block;  margin:5px 0 0 5px}