关于gridview和checkboxlist的嵌套使用

<script type="text/javascript">
 function CheckBoxList1_Click(obj) {
       if(obj<10)
       {
        var vv="ctl00_PageBody_gvItem_ctl0"+obj+"_CheckBox1";
       }
      else if(obj>=10 && obj<=99)
       {
        var vv="ctl00_PageBody_gvItem_ctl"+obj+"_CheckBox1";
       }
       else{
        var vv="ctl00_PageBody_gvItem_ct"+obj+"_CheckBox1";
       }
     
            if(obj<10)
            {
             var vvv="ctl00_PageBody_gvItem_ctl0"+obj+"_gvInnerItem";
            }
            else if(obj>=10 && obj <=99)
            {
             var vvv="ctl00_PageBody_gvItem_ctl"+obj+"_gvInnerItem";
            }
            else
            {
             var vvv="ctl00_PageBody_gvItem_ct"+obj+"_gvInnerItem";
            }
   
           if(document.getElementById(vv).checked)
            {
       for(var i=0;i<document.getElementById(vvv).getElementsByTagName("input").length;i++)

            {
            if(obj<10)
            {
             var v = "ctl00_PageBody_gvItem_ctl0"+obj+"_gvInnerItem_"+i ;
            }
            else if(obj>=10 && obj<100)
            {
              var v = "ctl00_PageBody_gvItem_ctl"+obj+"_gvInnerItem_"+i ;
            }
            else
            {
             var v = "ctl00_PageBody_gvItem_ct"+obj+"_gvInnerItem_"+i ;
            }
                document.getElementById(v).checked=true;
            }            
            }
        else
        {
         for(var i=0;i<document.getElementById(vvv).getElementsByTagName("input").length;i++)

            {
            if(obj<10)
            {
             var v = "ctl00_PageBody_gvItem_ctl0"+obj+"_gvInnerItem_"+i ;
            }
            else if(obj>=10 && obj<100)
            {
              var v = "ctl00_PageBody_gvItem_ctl"+obj+"_gvInnerItem_"+i ;
            }
            else
            {
             var v = "ctl00_PageBody_gvItem_ct"+obj+"_gvInnerItem_"+i ;
            }
               //alert(v);
                document.getElementById(v).checked=false;
            }                  
        }
          //  alert(document.getElementById(vvv).getElementsByTagName("input").length);
        }
function selectAll()
  {
     //alert(document.getElementById("ctl00_PageBody_gvItem").getElementsByTagName("input").length);
  
        if( document.getElementById("ctl00_PageBody_CheckBox2").checked)
        {
             for(var i=0;i<document.getElementById("ctl00_PageBody_gvItem").getElementsByTagName("input").length;i++)

            {
            if(i<8)
            {
            document.getElementById("ctl00_PageBody_gvItem_ctl0"+(i+2)+"_CheckBox1").checked=true;
                 var vvv="ctl00_PageBody_gvItem_ctl0"+(i+2)+"_gvInnerItem";
                 //alert(vvv);
            }else if(i>=8 && i<98)
            {
            document.getElementById("ctl00_PageBody_gvItem_ctl"+(i+2)+"_CheckBox1").checked=true;
                 var vvv="ctl00_PageBody_gvItem_ctl"+(i+2)+"_gvInnerItem";
             //    alert(vvv);
            }
            else 
            {
            document.getElementById("ctl00_PageBody_gvItem_ct"+(i+2)+"_CheckBox1").checked=true;
                 var vvv="ctl00_PageBody_gvItem_ct"+(i+2)+"_gvInnerItem";
                // alert(vvv);
            }
                
                   for(var j=0;j<document.getElementById(vvv).getElementsByTagName("input").length;j++)
                 {
                 if(i<8)
                 {
                 var v = "ctl00_PageBody_gvItem_ctl0"+(i+2)+"_gvInnerItem_"+j ;
                 }else if(i>=8 && i<98)
                 {
                 var v = "ctl00_PageBody_gvItem_ctl"+(i+2)+"_gvInnerItem_"+j ;
                 }else
                 {
                 var v = "ctl00_PageBody_gvItem_ct"+(i+2)+"_gvInnerItem_"+j ;
                 }
                 
                
                //alert(v);
                document.getElementById(v).checked=true;
            }  
            }  
            }
            else
            {
           
        for(var i=0;i<document.getElementById("ctl00_PageBody_gvItem").getElementsByTagName("input").length;i++)

            {
            if(i<8)
            {
            document.getElementById("ctl00_PageBody_gvItem_ctl0"+(i+2)+"_CheckBox1").checked=false;
                 var vvv="ctl00_PageBody_gvItem_ctl0"+(i+2)+"_gvInnerItem";
               //  alert(vvv);
            }else if(i>=8 && i<98)
            {
            document.getElementById("ctl00_PageBody_gvItem_ctl"+(i+2)+"_CheckBox1").checked=false;
                 var vvv="ctl00_PageBody_gvItem_ctl"+(i+2)+"_gvInnerItem";
               //  alert(vvv);
            }
            else 
            {
            document.getElementById("ctl00_PageBody_gvItem_ct"+(i+2)+"_CheckBox1").checked=false;
                 var vvv="ctl00_PageBody_gvItem_ct"+(i+2)+"_gvInnerItem";
                // alert(vvv);
            }
                
                   for(var j=0;j<document.getElementById(vvv).getElementsByTagName("input").length;j++)
                 {
                 if(i<8)
                 {
                 var v = "ctl00_PageBody_gvItem_ctl0"+(i+2)+"_gvInnerItem_"+j ;
                 }else if(i>=8 && i<98)
                 {
                 var v = "ctl00_PageBody_gvItem_ctl"+(i+2)+"_gvInnerItem_"+j ;
                 }else
                 {
                 var v = "ctl00_PageBody_gvItem_ct"+(i+2)+"_gvInnerItem_"+j ;
                 }
                 
                
               // alert(v);
                document.getElementById(v).checked=false;
            }  
            }
            } 
           
    }
     </script>

     <asp:GridView runat="server" ID="gvItem" OnRowDataBound="gvItem_RowCommand" DataKeyNames="state"
                    Width="100%" AutoGenerateColumns="false">
                    <Columns>
                        <asp:TemplateField HeaderText="选择省份">
                            <ItemTemplate>
                                <asp:CheckBox runat="server" ID="CheckBox1" onclick="CheckBoxList1_Click(this.parentNode.parentNode.rowIndex+parseInt(1))" />
                            </ItemTemplate>
                        </asp:TemplateField>
                        <asp:BoundField DataField="State" HeaderText="省份名称" />
                        <asp:TemplateField HeaderText="选择地市">
                            <ItemTemplate>
                                <div style="text-align: left">
                                    <asp:CheckBoxList RepeatLayout="Flow" RepeatDirection="Horizontal" runat="server"
                                        ID="gvInnerItem" OnSelectedIndexChanged="gvInnerItem_SelectChange" AutoPostBack="false">
                                    </asp:CheckBoxList>
                                </div>
                            </ItemTemplate>
                        </asp:TemplateField>
                    </Columns>
                </asp:GridView>
                <asp:CheckBox ID="CheckBox2" runat="server" AutoPostBack="True" Font-Size="9pt" Text="全选"
                    onclick="selectAll()" />

   protected void gvItem_RowCommand(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
                CheckBoxList oGridView = (CheckBoxList)e.Row.FindControl("gvInnerItem");
                if (oGridView != null)
                {
                    string state = gvItem.DataKeys[e.Row.RowIndex].Value.ToString();
                    string sql = string.Format("select distinct(city) from CELLPHONESORT where state='{0}'", state);
                    DataSet ds = MyDB.GetDataSet(sql);

                    oGridView.DataSource = ds.Tables[0].DefaultView;
                    oGridView.DataValueField = "city";
                    oGridView.DataTextField = "city";
                    oGridView.DataBind();
                }
            }
        }