如何分别回显回调的JSON数组项？

Question

this is my callback, where the first item of the array is the title and the second is the button.

jQuery21306342411266173318_1460205778290([["I see you like this Mazda, don't you?","OK, give more info!"]])

On the frontend I use this, and it shows me both items. How can I get the first ( title ) and how the second (button) separately ?

function showPopup(data) { 
console.log(data[0]);
}

function alert(){
      $.getJSON("handler.php?type=alert&callback=?&cookie="+ y, showPopup);
}