How to ask the user for confirmation of an action with a popup box?

I'm currently coding a button which will delete a record from a database if clicked. However, I want some sort of confirmation after they click it so there are no accidents. I was imagining a popup box that tells them they are about to d开发者_运维问答elete this record with two buttons cancel and OK. If cancelled, nothing happens, but if OK is pressed, then the server would execute the delete as coded. How would I do this in asp/vb?

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Here is a button with a confirmation message :

<asp:Button runat="server" ID="btnDelete" 
     OnClick="btnDelete_Click" 
     OnClientClick="return confirm('Do you want to delete the record ? ');" />

Here is the way to add confirm client script at server side :

btnDelete.Attributes.Add("onclick", 
        "return confirm('Do you want to delete the record ? ');")

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Adding Client-Side Message Boxes in your ASP.NET Web Pages is a great tutorial to make client-side confirmation messages like this:

Using ASP.NET & VB.NET (Don't forget to read part2.)