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copied!<p>First, I think you're calling it the wrong thing. "JSON" stands for "JavaScript Object Notation" - it's just a specification for representing some data in a string that explicitly mimics JavaScript object (and array, string, number and boolean) literals. You're trying to build up a JavaScript object dynamically - so the word you're looking for is "object".</p> <p>With that pedantry out of the way, I think that you're asking how to set object and array properties.</p> <pre><code>// make an empty object var myObject = {}; // set the "list1" property to an array of strings myObject.list1 = ['1', '2']; // you can also access properties by string myObject['list2'] = []; // accessing arrays is the same, but the keys are numbers myObject.list2[0] = 'a'; myObject['list2'][1] = 'b'; myObject.list3 = []; // instead of placing properties at specific indices, you // can push them on to the end myObject.list3.push({}); // or unshift them on to the beginning myObject.list3.unshift({}); myObject.list3[0]['key1'] = 'value1'; myObject.list3[1]['key2'] = 'value2'; myObject.not_a_list = '11'; </code></pre> <p>That code will build up the object that you specified in your question (except that I call it myObject instead of myJSON). For more information on accessing properties, I recommend the <a href="https://developer.mozilla.org/en/JavaScript/Guide" rel="noreferrer">Mozilla JavaScript Guide</a> and the book <a href="http://rads.stackoverflow.com/amzn/click/0596517742" rel="noreferrer">JavaScript: The Good Parts</a>.</p>

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