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

<script type="text/javascript">
    function regexSubject()
    {
        var content = $.trim($("#message_subject").val());
        if(content.length ==0)
        {
            $("#subject_span").text("<%= l(:label_subject_empty) %>");
            $("#subject_span").css('color','#ff0000');
            return  false;
        }
        else
        {
            $("#subject_span").text("<%= l(:label_field_correct) %>");
            $("#subject_span").css('color','#008000');
            return true;
        }
        return false;
    }
    function regexContent()
    {
        var content = $.trim($("#message_content").val());
        if(content.length ==0)
        {
            $("#message_content_span").text("<%= l(:label_reply_empty) %>");
            $("#message_content_span").css('color','#ff0000');
            return  false;
        }
        else
        {
            $("#message_content_span").text("<%= l(:label_field_correct) %>");
            $("#message_content_span").css('color','#008000');
            return true;
        }
        return false;
    }
    function submitCoursesBoard()
    {
        if(regexSubject()&&regexContent()){$("#message-form").submit();}
    }
</script>
<%= error_messages_for 'message' %>
<% replying ||= false %>
<% extra_option = replying ? { readonly: true} : { maxlength: 200 } %>

<li>
  <label><span class="c_red">*</span>&nbsp;<%= l(:field_subject) %>&nbsp;&nbsp;：</label>
  <% if replying %>
      <%= f.text_field :subject, { size: 60, id: "message_subject",:class=>"talk_input w585" }.merge(extra_option) %>
  <% else %>
      <%= f.text_field :subject, { size: 60, id: "message_subject", onkeyup: "regexSubject();",:class=>"talk_input w585" }.merge(extra_option) %>
  <% end %>
  <span id="subject_span"></span>
</li>
<li class="ml60 mb5">
  <% unless replying %>
      <% if @message.safe_attribute? 'sticky' %>
          <%= f.check_box :sticky %>
          <%= label_tag 'message_sticky', l(:label_board_sticky) %>
      <% end %>
      <% if @message.safe_attribute? 'locked' %>
          <%= f.check_box :locked %>
          <%= label_tag 'message_locked', l(:label_board_locked) %>
      <% end %>
  <% end %>
  <div class="cl"></div>
</li>
<li>
  <label class="fl" ><span class="c_red">*</span>&nbsp;<%= l(:field_description) %>&nbsp;&nbsp;：</label>
  <div id="message_quote" class="wiki" style="width: 100%;word-break: break-all;word-wrap: break-word;"></div>
  <%= text_area :quote,:quote,:style => 'display:none' %>
  <%= f.text_area :content, :class => 'talk_text fl', :id => 'message_content', :onkeyup => "regexContent();", :maxlength => 5000,:placeholder => "最多3000个汉字(或6000个英文字符)" %>
  <span id="message_content_span"></span>
</li>
<div class="cl"></div>
<li>
  <label>&nbsp;&nbsp;<%= l(:label_attachment_plural) %>&nbsp;&nbsp;：</label>
  <%= render :partial => 'attachments/form_course', :locals => {:container => @message,:isReply => @isReply} %>
</li>
<li >
  <a href="#" onclick="submitCoursesBoard();"class="blue_btn fl c_white"><%= l(:button_submit)%></a>
  <%= preview_link({:controller => 'messages', :action => 'preview', :board_id => @board}, 'message-form' ,target='preview',{:class => 'blue_btn grey_btn fl c_white'} )%>
  <div class="cl"></div>
</li>