JavaScript 取GridView选择的 DataKeyNames

......
　　//设置选中产品值
        function SetSelProductID() {
            var selectCount = 0;
            var productID = "";
            var productType = "";
            var productName = "";
            var lblProductName = document.getElementById("lblSelProductName");
            var hidProductID = document.getElementById("hidProductID");
            var inputs = document.getElementById("<%=GridView1.ClientID%>").getElementsByTagName("input");
            lblProductName.innerText = "";
            hidProductID.value = "";
            for (var i = 0; i < inputs.length; i++) {
                if (inputs[i].type == "checkbox" && inputs[i].checked) {
                    productID = inputs[i].parentElement.parentElement.lastChild.innerText;
                    productName = inputs[i].parentElement.parentElement.childNodes[2].innerText;
                    productType = inputs[i].parentElement.parentElement.childNodes[6].innerText;                    
                    if (lblProductName.innerText == "") {
                        lblProductName.innerText = productName;
                        hidProductID.value = productID + "," + productType;
                    } else {
                        lblProductName.innerText = lblProductName.innerText + ";" + productName;
                        hidProductID.value = hidProductID.value + ";" + productID + "," + productType;
                    }
                }
            }
        }
　　......
　　<asp:GridView ID="GridView1" runat="server" AllowPagerable="False"
            AllowChangeCellWidth="True"   AutoGenerateColumns="False"
        CellPadding="0" DataKeyNames="ID" GridLines="None"
        CssClass="gridviewStyle" JumpButtonHeight="25px" JumpButtonWidth="25px"
            onrowdatabound="GridView1_RowDataBound" >
        <Columns>
　　<asp:TemplateField HeaderText="选择">
                <ItemStyle CssClass="gridview_itemStyle" Width="40px" HorizontalAlign="Center"/>
                <HeaderStyle CssClass="gridview_headerStyle" Width="40px"/>
                <ItemTemplate>
                    <input id="Checkbox1" type="checkbox" onclick ="SetSelProductID();" />                                  
                </ItemTemplate>
            </asp:TemplateField>　　　　
　　......
　　<asp:TemplateField HeaderText="产品类别2">
                    <ItemStyle CssClass="gridview_hiddenItemStyle" HorizontalAlign="left" Width="0px" />
                     <HeaderStyle CssClass="gridview_hiddenItemStyle" Width="0px" />
                    <ItemTemplate>
                        <asp:Label ID="lblType2" runat="server" Text='<%#  Eval("ProductCategory") %>'></asp:Label></ItemTemplate>                     
                    </asp:TemplateField>
             <asp:BoundField DataField="ProductID" HeaderText="产品ID">
                    <ItemStyle CssClass="gridview_hiddenItemStyle" HorizontalAlign="left" Width="0px" />
                    <HeaderStyle CssClass="gridview_hiddenItemStyle" Width="0px" />                 
             </asp:BoundField>   
        </Columns>
        <RowStyle CssClass="gridview_rowStyle" />
        <AlternatingRowStyle CssClass="gridview_alternatingRowStyle" />
        <EmptyDataTemplate>
            <table class="itemtable" cellspacing="1" cellpadding="2" border="0">
                <tbody>
                    <tr class="toplinebg">
                        <td width="40px" height="20">选择</td>
                        <td width="60px">序号</td>
                        <td width="100px">产品编号</td>
                        <td width="180px">产品名称</td>
                          <td width="60px">产品状态</td>
                            <td width="60px">所属分公司</td>
                            <td width="100px">产品类别</td>
                    </tr>
                      <tr >
                        <td  height="20" class="gridview_itemStyle2" colspan="7">暂无信息</td>                      
                    </tr>
                </tbody>
            </table>
        </EmptyDataTemplate>
    </asp:GridView>

css里的样式：
.gridview_hiddenItemStyle
{
    display:none;
}