HyperLinkField ต้องการความช่วยเหลือในการ Confirm ก่อนที่จะทำการ Delete ครับ

onclick="javascript:return confirm('Are you sure you want to delete ?');"

<ItemTemplate><asp:HyperLink ID="hlnk_Delete" onclick="javascript:return confirm('Are you sure you want to delete ?');" runat="server" style="width:100px; margin-left:50px; margin-right:100px"
NavigateUrl='<%# "Components/DeleteBook.aspx?SKU=" + Utility.SKUMask(Eval("lbhc_lb_sku").ToString()) %>'>Delete</asp:HyperLink></ItemTemplate>

                    <asp:HyperLinkField HeaderText="DEL" onclick="javascript:return confirm('Are you sure you want to delete ?');" Text="DEL" DataNavigateUrlFields="stid" 
                        DataNavigateUrlFormatString="dstudent.aspx?stid={0}" DataTextField="stid" 
                        DataTextFormatString="DEL">
                    <ControlStyle Width="2px" />
                    </asp:HyperLinkField>

 <asp:TemplateField HeaderText="DEL">
                        <ItemTemplate>
                            <asp:HyperLink ID="HyperLink1" onclick="javascript:return confirm('Are you sure you want to delete ?');" runat="server" 
                                NavigateUrl='<%# Eval("stid", "dstudent.aspx?stid={0}") %>' 
                                Text='<%# Eval("stid", "DEL") %>'></asp:HyperLink>
                        </ItemTemplate>
                        <ControlStyle Width="2px" />
                    </asp:TemplateField>