title: Use google maps computeDistanceBetween to get the closest location returns NaN
body: <p>Ok so I have set up a map and an autocomplete field on a testing site.</p>
  
  <p>My goal is to get the user to input his/her address into the field and then when he/she clicks confirm work out the closest store to them based on the information provided.</p>
  
  <p>I have the lat/long for each store and with the help of autocomplete I now have the lat/long of the users address but when I use the computeDistanceBetween method provided in the documentation I get NaN instead of a desired result.</p>
  
  <p>Here is a link to the test site to get an idea - <a href="http://dev.touch-akl.com/map/" rel="noreferrer">http://dev.touch-akl.com/map/</a></p>
  
  <p>And Below is what I have tried so far</p>
  
  <pre><code>    //----------------------------------------------------------------
      //--- Search Box -------------------------------------------------
  
      var input = document.getElementById('address');
      var $confirm = $('#confirm');
  
      var options = {
         types: ['geocode'],
         componentRestrictions: {country: 'nz'}//Turkey only
      };        
  
      var autocomplete = new google.maps.places.Autocomplete(input,options);
      autocomplete.bindTo('bounds', map);
  
      $confirm.click(function(){
  
          var _street = $('#address').val();
          var place = autocomplete.getPlace();
          var _coordinates = place.geometry.location.toString();
          var _delivery = _coordinates.substring(1, _coordinates.length - 1);
          var _kCord = '-36.874694,174.735292';
          var _pCord = '-36.858317,174.782284'
  
          console.log(_coordinates);
          console.log(_delivery);
  
          console.log(google.maps.geometry.spherical.computeDistanceBetween(_pCord, _delivery));
          console.log(google.maps.geometry.spherical.computeDistanceBetween(_kCord, _delivery));
  
  
      });
  </code></pre>