I have a problem accessing JSON data. I'm new to JSON an jquery so there is probably a easy solution to it and i would be glad to find out.

My jQuery:

  $.post(
    "currentPage.php",
    { 
    'currentPage': 1
    },
    function(data){
      $("body").append(data);  
    }
  );

currentPage.php:

$returnArray['left'] = 'test_left';
$returnArray['right'] = 'test_right';

$returnArray['numLeft'][] = 1;
$returnArray['numRight'][] = 2;
$returnArray['numRight'][] = 3;

print json_encode($returnArray);

i tried to access the data like this: data.left data['left']

but it returns blank, how is the best way to access the data?