asp.net中调用JavaScript的错误

大家好。我是初学者。我要在asp.net里调用一段JavaScript check_word1()的功能，但是老是出现
编译器错误信息: BC30456: “Check_word1”不是“ASP.WebForm1_aspx”的成员。请帮我看下以下代码要怎么修改。

<%@ Page Language="vb" AutoEventWireup="false" Codebehind="WebForm1.aspx.vb" Inherits="spelling.WebForm1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>WebForm1 </title>
<script language="JavaScript">

function Check_word1()
var key1, word1;
key1 = "cat";
word1 = TextBox1.text;
var times = 0;

{
var result, correct = false;

  while (times <3 && correct == false)
  {
    result = TextBox1.text;
times++;
if (result == key1)
{
correct = true;
}
      else
  {
  alert("Try again!");
  return times;

}
}
  if (correct == true)
  {
alert("You are great!");
    }
    else
    {
      alert("The correct answer is " + key1 + ".");
    }
}
</script>
<script language="vb" runat="server">
    Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
Response.Write(" <script>Check_word1() </script>")
End Sub
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
btnSubmit.Attributes.Add("onclick", "return Check_word1();")
End Sub
</script>
<meta content="True" name="vs_snapToGrid">
<meta content="True" name="vs_showGrid">
<meta content="Microsoft Visual Studio .NET 7.1" name="GENERATOR">
<meta content="Visual Basic .NET 7.1" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<TABLE id="Table1" style="Z-INDEX: 101; LEFT: 104px; WIDTH: 451px; POSITION: absolute; TOP: 56px; HEIGHT: 248px"
cellSpacing="1" cellPadding="1" width="451" align="center" border="1">
<TR>
<TD align="center"> <asp:label id="Label1" runat="server" Height="24px" Width="32px">猫 </asp:label> </TD>
<TD align="center"> <asp:textbox id="TextBox1" runat="server" Width="144px"> </asp:textbox> </TD>
<TD align="center"> <asp:button id="btnSubmit" onclick="Check_word1()" runat="server" Height="24px" Width="56px"
Text="Check"> </asp:button> </TD>
</TR>
</TABLE>
</form>
</body>
</HTML>
--------------------编程问答-------------------- 对vb的语言不了解，但是我看出来俩点问题：
1.
function Check_word1()
var key1, word1;
key1 = "cat";
word1 = TextBox1.text;
var times = 0;
....
word1的值应该这么得到把: word1 = document.getElementById("TextBox1").value;

2,button有个属性 onClientClick的click事件,楼主应该不用

btnSubmit.Attributes.Add("onclick", "return Check_word1();")

难道和这句有关系?

--------------------编程问答-------------------- word1 = TextBox1.text;
javascript里的赋值？ --------------------编程问答-------------------- <asp:button id="btnSubmit" onclick="Check_word1()" runat="server" Height="24px" Width="56px"
Text="Check"> </asp:button>
你的这个响应代码回传了，肯定在.cs文件里找不到，所以会报错 --------------------编程问答-------------------- <script language="vb" runat="server">
    Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSubmit.Click
Response.Write(" <script>Check_word1() </script>")
End Sub
    Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
btnSubmit.Attributes.Add("onclick", "return Check_word1();")
End Sub
</script>

OnClick事件是在vb后台写的，应该还有个OnClientClick事件是调用客户端方法（js方法）
去掉：
btnSubmit.Attributes.Add("onclick", "return Check_word1();") button的默认事件只有click和clientclick
把下面的改成下面这样：
<asp:button id="btnSubmit" OnClientClick="Check_word1()" runat="server" Height="24px" Width="56px"
Text="Check">

应该会有个找不到对象的错误，自己继续找我上面说了~

--------------------编程问答-------------------- 谢谢楼上的回答~
btnSubmit.Attributes.Add("onclick", "return Check_word1();")
这个是为了调用JavaScript 定义的那个功能

请问楼上，如果是因为回传的错误，那么应该怎么改呢？

补充：.NET技术 ,  ASP.NET