后台怎么获取这个 订单编号 ID的值

前台 ——————
 <script src="../JS/jquery-1.4.2.min.js" type="text/javascript"></script>
       <script type="text/javascript">
    
     function divtan(id) {
        $("#orderId").html(id);
        $.post("admin/VerifyEidt.aspx", { id: id, action: 1 }, function(data) {
        
            $("#oldstate").html(data);
         
        });
        $("#main").css("opacity", "0.3");
        var wid = $(window).width();
        var hei = $(window).height();
        var lef = (wid - 400) / 2 + "px";
        var heii = (hei - 200) / 2 + "px";
        $("#dialog").css({
            "z-index": "5",
            "position": "absolute",
            "display": "block",
            "width": "400px",
            "height": "200px",
            "left": lef,
            "top": heii,
            "background": "#ADD8E6",
            "color": "red",
            "border": "1px solid #87CEEB"
        });       $("#close").click(function(event) {             $("#dialog").slideUp("1000");             $("#main").css("opacity", "1.0");         });
     }
    </script>            
            
              <div id="dialog" style="display:none;padding:8px;">
<div id='close' style="text-align:right; padding-right:40px; cursor:pointer">close</div>
<div id="p1"><table style="color:#000; font-size:13px" align="center">
<caption  style="font-weight:bold">修改论文审核状态</caption>
 <tr><td>订单编号：</td><td id="orderId" runat="server">123432424</td></tr>
 <tr><td>订单原状态：</td><td id="oldstate">已发货</td></tr>
  <tr><td>新状态：</td><td><asp:DropDownList ID="ddlUD" runat="server" AutoPostBack="True">
            <asp:ListItem>审核中</asp:ListItem>
            <asp:ListItem>一审</asp:ListItem>
            <asp:ListItem>二审</asp:ListItem>
            <asp:ListItem>优秀</asp:ListItem>
        </asp:DropDownList></td></tr>
   
</table>
<table id="fahuoh" style="color:#000; font-size:13px" align="center"></table>
<table style="color:#000; font-size:13px" align="center">
<tr><td> <asp:Button ID="Button2" runat="server" Text="Button"  onclick="Button2_Click" /></td></tr>
</table>
</div>
</div>