Live intercept and True Intent study - by: serra

Hi all,
I was wondering if LimeSurvey or any plugin is currently able to do the following:

- Intercepting a user at the beginning of a visit in a website by showing a question like "would you like to answer a few questions when you're done with your visit?"
- if the user says yes, provide a layer with a button to start the survey
- launch the survey when the user clicks the button or closes the website (only if he answered "yes" to the first question.

I imagine this is not a stock LimeSurvey feature. If it is not, is there any plugin there capable of this?
Or is there someone interested in developing this feature?

Thanks