框架页面提交问题，c#无法实现嘛？

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="left1.aspx.cs" Inherits="watermanager_left1" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body bgcolor="#6699cc">
 <form id="form1" runat="server">
    <div>
    <table border="0" cellspacing="0" cellpadding="0" align="center" width="100%">     <tr height="20">
      <td style="font-size:12px;color:#00346D;font-weight:20" align="left">开始时间：<asp:TextBox ID="cbsj_star" runat="server" MaxLength="10"  Width="80px"></asp:TextBox>
      </td>
   </tr> 
   <tr height="20">
      <td style="font-size:12px;color:#00346D;font-weight:20" align="left">截止时间：<asp:TextBox ID="cbsj_end" runat="server" MaxLength="10"  Width="80px"></asp:TextBox>
      </td>
   </tr>           
    <tr height="20">
        <td style="font-size:12px;color:#00346D;font-weight:200"><a href="javascript:sbkj_tj()">按水表口径分类统计</a></td>
   </tr>
   <tr height="20">
         <td style="font-size:12px;color:#00346D;font-weight:200"><a href="javascript:ysxz_tj()">按用水性质分类统计</a></td>
   </tr>  
</table>
    </div>
    </form>
</body>
</html>
<script>
  function xxlx_tj(){
    t=new Date()
    window.open("sbkj_tj.aspx?sDate=" + document.all("cbsj_star").value + "&eDate=" + document.all("cbsj_end").value + "&" + t.getSeconds()  ,"main");
  
  }
  function xxly_tj(){
    t=new Date()
    window.open("ysxz_tj.aspx?sDate=" + document.all("cbsj_star").value + "&eDate=" + document.all("cbsj_end").value + "&" + t.getSeconds() ,"main");
  
  }</script>