怎样在datalist里实现全选呢?
<asp:DataList ID="dataList" DataKeyField="id" Runat="server">
<ItemTemplate>
<asp:CheckBox ID="chkselect" Text="选择" Runat="server"></asp:CheckBox>
</ItemTemplate>
<FooterTemplate> <asp:CheckBox ID="all" Text="全部" Runat="server"></asp:CheckBox>
</FooterTemplate>
</asp:DataList>
怎样实现当点击"全部"时,所有chkselect选中或取消呢???