Webform（邮箱模式）

 <asp:Repeater ID="Repeater1" runat="server">
            <HeaderTemplate>
                <table id="tb1">
                    <tr id="tr1">
                        <td>全选<input type="checkbox" id="ckall" /></td>
                        <td>学号</td>
                        <td>姓名</td>
                        <td>性别</td>
                        <td>生日</td>
                        <td>年龄</td>
                        <td>专业</td>
                        <td>民族</td>
                        <td>操  作</td>
                    </tr>
            </HeaderTemplate>
            <ItemTemplate>
                <tr class="tr_item" style="<%#Eval("Red")%>">
                     <td>
                        <input type="checkbox" class="ck" name="aaa" value='<%#Eval("Code") %>' /></td>
                    <td><%#Eval("Code")%></td>
                    <td><%#Eval("Name")%></td>
                    <td><%#Eval("SexStr")%></td>
                    <td><%#Eval("BirStr")%></td>
                    <td><%#Eval("Age")%></td>
                    <td><%#Eval("SubjectName")%></td>
                    <td><%#Eval("NationName")%></td>
                    <td>
                         <a id="lian"  onclick="return del()" href="Delete.aspx?id=<%#Eval("Code") %>">删除</a>&nbsp;
                        <a id="xiu" target="_blank"  href="Update.aspx?up=<%#Eval("Code") %>">修改</a>
                    </td>
                </tr>
            </ItemTemplate>
            <FooterTemplate>
                </table>

            </FooterTemplate>
        </asp:Repeater>

 var oCkall = document.getElementById("ckall");

     oCkall.onclick = function () {
         var oCks = document.getElementsByClassName("ck");
         for (var i = 0; i < oCks.length; i++) {
             oCks[i].checked = oCkall.checked;
         }
     };

     var oCkss = document.getElementsByClassName("ck");
   
     for (var i = 0; i < oCkss.length;i++) {
         oCkss[i].onclick = function () {
             var count = 0;
             for (var j = 0; j < oCkss.length;j++) {
                 if (oCkss[j].checked == false) {
                     count++;
                 }
             };//for

             if (count <= 0) {
                 oCkall.checked = true;
             }
             else {
                 oCkall.checked = false;
             }

         };//ockss.click
     }//ockss.onclick for

 void Button1_Click(object sender, EventArgs e)
    {
        string aaaa = Request["aaa"];
        Label1.Text = aaaa;

        string[] all = aaaa.Split(',');

        


    }