socialforge/app/views/admin/messages.html.erb

<%= javascript_include_tag "/assets/kindeditor/kindeditor",'/assets/kindeditor/pasteimg'  %>
<h3 style="float: left">
  <%=l(:label_system_message)%>
</h3><br/>
<div style="padding-top: 20px; padding-left: 5px;">
  <%= form_for(@admin_messages, :html => {:id =>'system_message', :multipart => true}) do |f| %>
      <div class="field">
        <%= f.kindeditor :content, :edit_id => 'system_message',
                         :width => '87%',
                         :resizeType => '0',
                         :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("<22><><EFBFBD>ݲ<EFBFBD><DDB2><EFBFBD>Ϊ<EFBFBD><CEAA>");
          $("#content_notice_span").css('color', '#ff0000');
          $("#content_notice_span").focus();
      }
      else if (obj.length > 255) {
          $("#content_notice_span").text("<22><><EFBFBD>ݹ<EFBFBD><DDB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>255<35><35><EFBFBD>ַ<EFBFBD>");
          $("#content_notice_span").css('color', '#ff0000');
          $("#content_notice_span").focus();
      }
      else {
          $("#content_notice_span").text("<22><>д<EFBFBD><D0B4>ȷ");
          $("#content_notice_span").css('color', '#008000');
          $("#system_message").submit();
      }
  }
</script>