Retrieving value from JavaScript after animation has ended

I'm using this jsfiddle for the animation and the final value is

wheel.segments[i]

http://ift.tt/1sGa6li

And I would like to retrieve that value after animation has stopped so I can use it in PHP. I tried something like:

 function retrivewinner() { 
   var winner = wheel.segments[i];
   window.location.href = "index.php?tag=" + winner; 
 }  

But it would freeze the browser or reload each time