User Confirmation in MVP Pattern with Passive View

How would you handle calling a user confirmation dialog before continuing with a task in a web-based MVP pattern implementation? It'll have to do a postback in between and the confirmation would go out of the scope of the presenter function that called it. I'd prefer to keep to a pure MV开发者_如何学GoP implementation but is it even possible?

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You can't implement this logic in one single server-side function. I believe the standard approach to tackle this is either to

• Have multiple steps that each involve one postback to the server. One of these steps would be the confirmation dialog you mentioned

or

• Show the confirmation dialog via Javascript