有母板页的内容页调用NicEdit编辑器问题！
<%@ Page Title="" Language="C#" MasterPageFile="~/teacher_master.master" AutoEventWireup="true" CodeFile="th_creatework.aspx.cs" Inherits="th_creatework" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="js/nicEdit.js"></script>
<script type="text/javascript" src="js/nicEdit-latest.js"></script>
<link href="css/teacher_content.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
bkLib.onDomLoaded(function () {
new nicEditor({ fullPanel: true }).panelInstance('txt_Content');
});
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<div class="context">
<div class="title"><p>作业</p>
</div>
<div class="change_course">
<table class="creatework">
<tr>
<td >
选择课程*
</td>
<td>
<asp:DropDownList ID="DropDownList2" runat="server">
</asp:DropDownList>
</td>
</tr>
</table>
</div>
<div class="create_w">
<table class="creatework">
<tr >
<td style=" color:Red;">
作业名称*
</td>
<td >
<asp:TextBox ID="TextBox_name" runat="server" Width="366px"></asp:TextBox>
</td>
</tr>
<tr >
<td style=" color:Red; text-align:right " valign="top">
描述*
</td>
<td >
<asp:TextBox ID="txt_Content" runat="server" TextMode="MultiLine" Width="500px" Height="300px"></asp:TextBox>
</td>
</tr>
</table>
</div>
</div>
</asp:Content>
引用到的控件是ID="txt_Content" 的TextBox控件
错误：
各种js里面的错误 什么对象为null之类的 我把同样的代码放到没有母版页的页面上又是能正常运行的 --------------------编程问答-------------------- 顶顶顶！ 求大神帮忙看看
补充：.NET技术 , ASP.NET
