title: Dynamically add group of fields in magento while creating products
body: <p>I am creating a tour portal in magento 1.8.
  The thing I need is to add a group of fields included in the itinerary like place of departure and time according to the no. of days specified for the tour.</p>
  
  <p>eg. If i specify the tour duration to be 2 days i should get 2 sets of the above fields grouped as day 1 and day 2.</p>
  
  <p>How can i accomplish that?</p>