javascript页面中怎么取得变量值后自动填入？
其中，分数下面这个打算写入的数据ID是TBox11 ，读取的数据ID来自 _41
现在分数这个值，需要手动输入，怎么才能在“合计”算出来的时候，自动填入到分数框里？
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前台代码如下：
程序代码：<%@ Page Language="C#" AutoEventWireup="true" CodeFile="inputstudentscore.aspx.cs" Inherits="inputstudentscore" StylesheetTheme="Blue" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.>
<html xmlns="http://www. >
<head runat="server">
<title>无标题页</title>
<link href="link.css" rel="stylesheet" type="text/css" />
<link href="../link.css" rel="stylesheet" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div>
<table align="center" style="background-color: #ABFCB0">
<tr>
<td style="width: 456px; height: 22px; text-align: center">
<strong><span style="font-size: 14pt; color: #ff00cc; font-family: 仿宋_GB2312">输入我的员工成绩</span></strong></td>
</tr>
<tr>
<td style="width: 456px; height: 40px; text-align: center">
<span style="font-size: 10pt; color: #0000ff"><strong>考核: </strong></span>
<asp:DropDownList ID="DropDownList1" runat="server" Font-Bold="True" Font-Size="10pt"
Width="113px">
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" Font-Size="10pt" OnClick="Button1_Click"
Text="确定" /></td>
</tr>
<tr>
<td style="width: 456px; height: 23px">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
BackColor="LightGoldenrodYellow" BorderColor="Tan" BorderWidth="1px" CellPadding="0"
Font-Bold="True" Font-Size="10pt" ForeColor="Black" GridLines="None" Height="5px" Width="456px" >
<FooterStyle BackColor="Tan" />
<Columns>
<asp:BoundField DataField="sno" HeaderText="用户名">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="sname" HeaderText="姓名">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="cno" HeaderText="考核号">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="cname" HeaderText="考核岗位">
<ItemStyle HorizontalAlign="Center" />
</asp:BoundField>
<asp:TemplateField HeaderText="分数">
<EditItemTemplate>
<asp:TextBox ID="TBox1" runat="server" Text='<%# Bind("degree") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="TBox11" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"degree") %>'
Width="25px"></asp:TextBox>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="季度">
<EditItemTemplate>
<asp:TextBox ID="TBox2" runat="server" Text='<%# Bind("jidu") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="TBox22" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"jidu") %>'
Width="25px"></asp:TextBox>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="年度">
<EditItemTemplate>
<asp:TextBox ID="TBox3" runat="server" Text='<%# Bind("year") %>'></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:TextBox ID="TBox33" runat="server" Text='<%# DataBinder.Eval(Container.DataItem,"year") %>'
Width="30px"></asp:TextBox>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
</Columns>
<SelectedRowStyle BackColor="DarkSlateBlue" ForeColor="GhostWhite" />
<PagerStyle BackColor="PaleGoldenrod" ForeColor="DarkSlateBlue" HorizontalAlign="Center" />
<HeaderStyle BackColor="Tan" Font-Bold="True" />
<AlternatingRowStyle BackColor="PaleGoldenrod" />
</asp:GridView>
<asp:Button
ID="Button2" runat="server" Text="保存成绩" OnClick="Button2_Click" />
<input type="reset" ID="Button3" runat="server" Text="取消" /></td>
</tr>
</table>
</div>
</form>
</form>
<p>请在黄色框内输入数字，将自动计算小计及合计。</p>
<SCRIPT language="javascript">
function SumNum10()
{
var sumValue20
a10=eval(_21.value);
b10=eval(_22.value)
if (isNaN(a10))
{a10=0}
if (isNaN(b10))
{b10=0}
sumValue21 = a10/b10;
self['_30'].value =sumValue21;
var sumValue30
a10=eval(_21.value);
b10=eval(_22.value)
if (isNaN(a10))
{a10=0}
if (isNaN(b10))
{b10=0}
sumValue30 = a10/b10*25;
self['_40'].value =sumValue30;add()
}
</script>
<table width="800" border="1" cellspacing="2" cellpadding="10">
<tr>
<th width="30" scope="col">服务满意度</th>
<th width="40" scope="col">业务部门全员问券评分</th>
<th width="20" scope="col">> 8分</th>
<th width="10" scope="col">25</th>
<th width="40" scope="col">满意度表平均分值</th>
<th width="40" bgcolor="#FFFF00" scope="col"><input id="_21" type="text" size="5" onkeyup="value=value.replace(/[^\d\.]/g,'');SumNum10();"></th>
<th width="40" bgcolor="#FFFF00" scope="col"><input id="_22" type="text" size="5" onkeyup="value=value.replace(/[^\d\.]/g,'');SumNum10();"></th>
<th width="40" scope="col"><input id="_30" type="text" size="5"></th>
<th width="40" scope="col"><input id="_40" type="text" size="5"></th>
</tr>
</table>
</script>
<script type="text/javascript">
function add(){
// 如果不是数字,或者没有填写就默认为0
var var000 = parseFloat(document.getElementById('_40').value) || 0;
document.getElementById('_41').value = var000;
document.getElementById('TBox11').value = document.getElementById('_41').value;
}
</script>
<table width="800" border="1" cellspacing="2" cellpadding="10">
<tr>
<th width="30" scope="col">合计</th>
<th width="40" scope="col"><input id="_41" type="text" size="5"></th>
</tr>
</table>
</body>
</html>
