ticker.js

     var row = {"put":{"strikePrice":12.5,"lastPrice":0,"vol":0,"bid":5.6,"expiry":"2014-09-20","openInt":0,"ask":6.5,"net":0,"type":"PUT","ticker":"I"},"call":{"strikePrice":12.5,"lastPrice":0,"vol":0,"bid":5.6,"expiry":"2014-09-20","openInt":0,"ask":6.5,"net":0,"type":"CALL","ticker":"I"}}; 

      getCellContent: function(row) {
        window.console.log('row: ' + JSON.stringify(row));
        window.console.log('1: ' + row['put'].openInt);
        window.console.log('2: ' + row.put.openInt);
        window.console.log('3: ' + row['put']['openInt']);
        return row['put']['openInt'];
      }
      
      
      The output:
      
     row: {"put":{"strikePrice":12.5,"lastPrice":0,"vol":0,"bid":5.6,"expiry":"2014-09-20","openInt":0,"ask":6.5,"net":0,"type":"PUT","ticker":"I"},"call":{"strikePrice":12.5,"lastPrice":0,"vol":0,"bid":5.6,"expiry":"2014-09-20","openInt":0,"ask":6.5,"net":0,"type":"CALL","ticker":"I"}} 
     1: undefined 
     2: undefined
     3: undefined 
     
     
     
     This works as expected in jsbin http://jsbin.com/lufus/1/edit