Open new Window using DataGrid C#

Following code will create a label in HeaderTemplate and a Hyperlink in ItemTeplate. By clicking on dat link a new window can be open. But as datagrid will shown only when it has data so hyperlink can be used to shown some data from db.

<asp:DataGrid ID="DataGrid1" runat="server" AutoGenerateColumns="false" Width="100%" OnItemCommand="DataGrid1_ItemCommand1" OnSelectedIndexChanged="DataGrid1_SelectedIndexChanged1" Height="181px">
        <Columns>
        <asp:TemplateColumn>
        <HeaderTemplate>
            <asp:Label ID="Label1" runat="server" Text="New Window"></asp:Label>
        </HeaderTemplate>
        <ItemTemplate>
           <asp:HyperLink ID="HyperLink1" runat="server">Hyperlink</asp:HyperLink>
                     </ItemTemplate>
        </asp:TemplateColumn>
        </Columns>
        </asp:DataGrid>


Follwing script code should be shown under Head Tag.
<script type="text/javascript">
function fun()
{
var detailsWindow;
detailsWindow=window.open(myurl,"dfd","width=400,height=350, menubar,resizable ");
detailsWindow.focus();
return false;
}