diff --git a/app/models/system_message.rb b/app/models/system_message.rb
index 4802ba252..83e1ef615 100644
--- a/app/models/system_message.rb
+++ b/app/models/system_message.rb
@@ -1,4 +1,5 @@
 class SystemMessage < ActiveRecord::Base
   attr_accessible :content, :id, :user_id
   belongs_to :user
+  validates_length_of :content, maximum: 255
 end
diff --git a/app/views/admin/messages.html.erb b/app/views/admin/messages.html.erb
index 10f20e2a0..03fa80e75 100644
--- a/app/views/admin/messages.html.erb
+++ b/app/views/admin/messages.html.erb
@@ -3,7 +3,7 @@
   <%=l(:label_system_message)%>
 </h3><br/>
 <div style="padding-top: 20px; padding-left: 5px;">
-  <%= form_for(@admin_messages) do |f| %>
+  <%= form_for(@admin_messages, :html => {:id =>'system_message', :multipart => true}) do |f| %>
       <div class="field">
         <%= f.kindeditor :content, :edit_id => 'system_message',
                          :width => '87%',
@@ -11,9 +11,32 @@
                          :no_label => true
         %>
       </div>
+      <div>
+        <p id="content_notice_span" class="ml55"></p>
+      </div>
       <div class="actions">
         <%= f.submit l(:label_submit),:class => "small", :onclick => "system_message.sync;" %>
       </div>
   <% end %>
 </div>
+<script>
+  function system_message_length(obj)
+  {
+      if (obj.length == 0) {
+          $("#content_notice_span").text("内容不能为空");
+          $("#content_notice_span").css('color', '#ff0000');
+          $("#content_notice_span").focus();
+      }
+      else if (obj.length > 255) {
+          $("#content_notice_span").text("内容过长，超过255个字符");
+          $("#content_notice_span").css('color', '#ff0000');
+          $("#content_notice_span").focus();
+      }
+      else {
+          $("#content_notice_span").text("填写正确");
+          $("#content_notice_span").css('color', '#008000');
+          $("#system_message").submit();
+      }
+  }
+</script>
 
diff --git a/app/views/users/user_messages.html.erb b/app/views/users/user_messages.html.erb
index 5df911db6..a9984f929 100644
--- a/app/views/users/user_messages.html.erb
+++ b/app/views/users/user_messages.html.erb
@@ -55,7 +55,13 @@
           <li class="homepageNewsContent fl">
             <%= link_to usm.content.html_safe, {:controller => 'system_messages', :action => 'index'},
                         :class =>"newsGrey",
-                        :title => "#{usm.content.html_safe}" %></li>
+                        :onmouseover =>"message_titile_show($(this),event);",
+                        :onmouseout => "message_titile_hide($(this));"
+          %>
+          </li>
+          <div style="display:none;" class="message_title">
+            <%= ma.content.html_safe%>
+          </div>
           <li class="homepageNewsTime fl"><%= time_tag(usm.created_at).html_safe %> </li>
         </ul>
     <% end %>
@@ -325,7 +331,13 @@
                     <li class="homepageNewsContent fl">
                       <%= link_to ma.content.html_safe, {:controller => 'system_messages', :action => 'index'},
                                   :class =>"newsGrey",
-                                  :title => "#{ma.content.html_safe}" %></li>
+                                  :onmouseover =>"message_titile_show($(this),event);",
+                                  :onmouseout => "message_titile_hide($(this));"
+                   %>
+                    </li>
+                    <div style="display:none;" class="message_title">
+                      <%= ma.content.html_safe%>
+                    </div>
                     <li class="homepageNewsTime fl"><%= time_tag(ma.created_at).html_safe %> </li>
                   </ul>
                   <% end %>