how to open popup window when Gridview hyperlink clicks

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ASP.NET

Gridview

popup

hi all,

I want to open Popup window when the hyperlink clicks in gridview.
This hyperlink is inside template field.

here, its opening full page...I need width=500px and height=500px when hyperlink clicks.
and the popup window must be in center.

This is my code.

<asp:HyperLink runat="server" NavigateUrl='<%# string.Format("ViewDetailsPopup.aspx?IncId={0}&INo={1}&UserName={2}&Priority={3}&LocationDesc={4}",
                  HttpUtility.UrlEncode(Eval("Id").ToString()), HttpUtility.UrlEncode(Eval("INo").ToString()), HttpUtility.UrlEncode(Eval("UserName").ToString()),HttpUtility.UrlEncode(Eval("Priority").ToString()),HttpUtility.UrlEncode(Eval("LocationDesc").ToString())) %>'
                  Text="View Details"/>

Please help.

Thank you.