Array exists in an array of arrays
<p>How can I check if an array exists in an array of arrays ? I have tried either plain javascript and jquery methods but none seems to help.</p>

<p>IE this doesn't work:</p>

<pre><code>$.inArray( [1,2], [[0], [], [1,2]] )
</code></pre>

<p>Even a more simple one:</p>

<pre><code>[1,2] == [1,2] //gives false.
[1,2] === [1,2] //gives false.
</code></pre>

<p>ORDER is <strong>NOT</strong> important for my task, only same elements existing is neccesary.</p>
