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    <p><strong>Update</strong>: See Anthony Grist's comment on your question, I missed the fact that your JSON is invalid. Since he hasn't posted an answer, I'll pick it up.</p> <p>Your <a href="http://json.org" rel="nofollow">JSON</a> is invalid because you're returning two separate arrays, this one:</p> <pre><code>[{"v":"233","pv":"1.83","avd":"00:01:58","nv":"82.83%","br":"75.11%"}, {"v":"17","pv":"3.65","avd":"00:08:31","nv":"70.59%","br":"58.82%"}, {"v":"9","pv":"2.22","avd":"00:01:51","nv":"0.00%","br":"44.44%"}] </code></pre> <p>and this one:</p> <pre><code>[{"date":"2013-02-01","visits":63}, {"date":"2013-02-02","visits":30}] </code></pre> <p>You can't do that, because the top level of a JSON document must be <strong>one</strong> thing (an object or an array).</p> <p>You could return an object with properties for each array:</p> <pre><code>{ "vdata": [{"v":"233","pv":"1.83","avd":"00:01:58","nv":"82.83%","br":"75.11%"}, {"v":"17","pv":"3.65","avd":"00:08:31","nv":"70.59%","br":"58.82%"}, {"v":"9","pv":"2.22","avd":"00:01:51","nv":"0.00%","br":"44.44%"} ], "datedata": [{"date":"2013-02-01","visits":63}, {"date":"2013-02-02","visits":30} ] } </code></pre> <p>After parsing (see below), you can access that data like this:</p> <pre><code>console.log(data.vdata[0].v); // "233" console.log(data.datedata[0].date); // "2013-02-01" </code></pre> <p>Or an array with two slots, with each slot having one of your arrays in it:</p> <pre><code>[ [{"v":"233","pv":"1.83","avd":"00:01:58","nv":"82.83%","br":"75.11%"}, {"v":"17","pv":"3.65","avd":"00:08:31","nv":"70.59%","br":"58.82%"}, {"v":"9","pv":"2.22","avd":"00:01:51","nv":"0.00%","br":"44.44%"} ], [{"date":"2013-02-01","visits":63}, {"date":"2013-02-02","visits":30} ] ] </code></pre> <p>After parsing (see below), you can access that data like this:</p> <pre><code>console.log(data[0][0].v); // "233" console.log(data[1][0].date); // "2013-02-01" </code></pre> <p>Personally, I prefer using an object, since then it's clear which array I'm accessing.</p> <hr> <p>Original answer:</p> <p>jQuery will parse the JSON into an object for you and pass that to the <code>success</code> function, which you can then access just like any other object. In your case, the top level is an array. So:</p> <pre><code>$.ajax({ url: url, type: 'POST', dataType:"json", async: false, success: function(data) { // Use the line from above that suits the way // you updated your JSON structure } }); </code></pre> <hr> <p>Side note: <code>async: false</code> is deprecated and will be removed at some point. It's generally not a good idea to do synchronous ajax requests, it tends to lock up the UI of the browser during the request. Instead, just structure your code to continue processing when the <code>success</code> callback is triggered.</p>
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    1. POHow to access data in JSON format using javascript
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    1. COthanks @Crowder for answering but for some odd reason there is no data displayed on the log. I've tried putting up a simple `alert()` function under the `success` callback to check but even that did not triggered. Any ideas on how to troubleshoot?
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    2. CO@Darth: I thought from your question that you were successfully seeing the JSON come back, but it sounds like you weren't. That suggests that you're doing a cross-origin call and being blocked by the [Same Origin Policy](http://en.wikipedia.org/wiki/Same_origin_policy), which prohibits cross-origin calls. If the other end supports it, you could switch to using [JSONP](http://en.wikipedia.org/wiki/JSONP#JSONP), which bypasses the SOP, or (if, again, the source supports it) [CORS](http://www.w3.org/TR/access-control/). But CORS also requires browser support.
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    3. CO@Crowder yep I can display the returned JSON in the log with `console.log(Data)` which is odd.
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