作业描述大于20行才显示更多按钮

app/views/homework_common/index.html.erb

@@ -34,7 +34,7 @@
         <% end %>
         <div class="cl"></div>
         <script>
-            $(function(){if($("#bid_description_<%= homework.id%>_content").height()>38){$("#bid_show_more_des_button<%= homework.id%>").show();}});
+            $(function(){if($("#bid_description_<%= homework.id%>_content").height()>360){$("#bid_show_more_des_button<%= homework.id%>").show();}});
         </script>
         <div  id="bid_description_<%= homework.id%>" class="news_description mt5">
           <div id="bid_description_<%= homework.id%>_content" class="upload_img">