json result undefined
<p>i have callback of jquery ajax call with json result as:</p>

<pre><code>function (data) {
            alert(data);
            alert(data['169874']);
}
</code></pre>

<p>and:</p>

<pre><code>alert(data) shows: {"169874":"123"}
</code></pre>

<p>but:</p>

<pre><code>alert(data['169874']) shows undefined.
</code></pre>

<p>why is it undefined?</p>
