diff --git a/app/views/challenges/_form.html.erb b/app/views/challenges/_form.html.erb
index 5cdcefa42..ababe3b8e 100644
--- a/app/views/challenges/_form.html.erb
+++ b/app/views/challenges/_form.html.erb
@@ -56,6 +56,7 @@
   <li class="clearfix">
     <label class="panel-form-label fl">预备知识：</label>
     <div id="challenge_ready_konewlege">
+      <%#= f.text_area :ready_knowledge, :placeholder => "请输入完成当前任务依赖的知识点或者其它相关信息，指导学员完成任务" %>
       <textarea name="challenge[ready_knowledge]" placeholder = "请输入完成当前任务依赖的知识点或者其它相关信息，指导学员完成任务"></textarea>
     </div>
     <%#= f.kindeditor :ready_knowledge, :placeholder => "请输入完成当前任务依赖的知识点或者其它相关信息，指导学员完成任务", :width=>'87.5%', :height => 159, :resizeType => 0, :no_label => true %>
diff --git a/app/views/challenges/show.html.erb b/app/views/challenges/show.html.erb
index cc1f9a982..cac8f9bbb 100644
--- a/app/views/challenges/show.html.erb
+++ b/app/views/challenges/show.html.erb
@@ -2,14 +2,11 @@
 <%= stylesheet_link_tag "/assets/codemirror/codemirror" %>
 <%= stylesheet_link_tag "/assets/kindeditor/plugins/code/previewcode" %>
 
-<script src="lib/marked.min.js"></script>
-<script src="lib/prettify.min.js"></script>
-<script src="lib/raphael.min.js"></script>
-<script src="lib/underscore.min.js"></script>
-<script src="lib/sequence-diagram.min.js"></script>
-<script src="lib/flowchart.min.js"></script>
-<script src="lib/jquery.flowchart.min.js"></script>
-<script src="editormd.js"></script>
+
+<%= stylesheet_link_tag '/editormd/css/editormd','/editormd/css/editormd.min' %>
+<%= javascript_include_tag '/editormd/lib/marked.min.js','/editormd/lib/prettify.min.js','/editormd/lib/raphael.min.js','/editormd/lib/underscore.min.js','/editormd/lib/sequence-diagram.min.js',
+                        '/editormd/lib/flowchart.min.js','/editormd/lib/jquery.flowchart.min.js','/editormd/editormd.js'%>
+
 <script type="text/javascript">
     $(document).ready(function() {
         var wordsView;
@@ -19,7 +16,7 @@
             taskList        : true,
             tex             : true,  // 默认不解析
             flowChart       : true,  // 默认不解析
-            sequenceDiagram : true,  // 默认不解析
+            sequenceDiagram : true // 默认不解析
         });
 
     })
@@ -51,8 +48,9 @@
         </li>
         <li class="clearfix challenge_bottom">
           <label class="panel-form-label fl">预备知识：</label>
-          <div class="fl task-bg-grey panel-box-sizing panel-form-width-690">
-            <%= @challenge.ready_knowledge.blank? ? "无" : (h @challenge.ready_knowledge.html_safe) %>
+          <div class="fl task-bg-grey panel-box-sizing panel-form-width-690" id="wordsView">
+            <textarea style="display:none;"><%= @challenge.ready_knowledge %></textarea>
+            <%#= @challenge.ready_knowledge.blank? ? "无" : (h @challenge.ready_knowledge.html_safe) %>
           </div>
         </li>
         <li class="clearfix">