请教个JS

Question

如下 GridView首先加载数据库里的值, 金额1总 是GridView里所有金额1（txtJE1.Text）的总和。 金额2总 是GridView里所有金额2（txtJE2.Text）的总和. 在网页浏览时每次修改金额1和金额2里的值 金额1总和金额2总的值会自动改变要用JS，该如何实现？<asp:GridView ID="GVRoomList" runat="server">
    <Columns>
       <asp:templatefield headertext="金额1">
            <itemtemplate>
                <asp:TextBox ID="txtJE1" runat="server" Text='<%# Eval("APPSUM")%>'></asp:TextBox>
            </itemtemplate>
       </asp:templatefield>
       <asp:templatefield headertext="金额2">
           <itemtemplate>
               <asp:TextBox ID="txtJE2" runat="server" Text='<%# Eval("NEEDSUM")%>'></asp:TextBox>
           </itemtemplate>
       </asp:templatefield>
    </Columns>
</asp:GridView>
<table>
    <tr>
        <td style="width:15%">金额1总：</td>
        <td><asp:TextBox ID="txtJESUM1" runat="server" BorderStyle="Groove"></asp:TextBox></td>
        <td style="width:13%">金额2总：</td>
        <td><asp:TextBox id="txtJESUM2" runat="server" BorderStyle="Groove"></asp:TextBox></td>
    </tr>
</table>

Answer 1

    var oTbl=document.getElementById("GVRoomList");
    var total1 ,total2;
    for(var i=1;i<oTbl.rows.length;i++)     {
    tr=oTbl.rows.item(i);
  je1=tr.cells[1].children[0].value;
  je2=tr.cells[2].children[0].value;
          total1 += parseFloat(je1);
          total2 += parseFloat(je2)
    }
    document.getElementById("txtJESUM1").value=total1; 
    document.getElementById("txtJESUM2").value=total2; 

Answer 2

经baobei7758的方法 测试 显示出的是2个 NaN
什么原因

Answer 3

2个 NaN 
 没取到值吧！

Answer 4

“要用JS”，那么不妨到html/css论坛去问问看。