cannot print the array passed from javascript to php
<p>here is the code.......here i am passing a javascript array to php... something is going wrong........</p>

<p>html:</p>

<pre><code>    &lt;html&gt;
    &lt;body onload="aa()" &gt;
&lt;script language="javascript"&gt;
function aa()
{
var a, s;
a = [ 'one', 'two', 'three'];
s = JSON.stringify( a );
document.getElementById("fb_user").innerHTML= s;
}

    &lt;/script&gt;
&lt;form action="check1.php" method="post"&gt;
    &lt;label id="fb_user"&gt; &lt;/label&gt;
&lt;input type="submit" value="submit"/&gt;
&lt;/form&gt;
&lt;/body&gt;
&lt;/html&gt;
</code></pre>

<p>php code:</p>

<pre><code>&lt;?php

$fb_usr_id =json_decode(  $_POST['fb_user'], true );

    echo $fb_usr_id;
    ?&gt;
</code></pre>

<p>when $fb_usr_id is echoed nothing is printed??</p>
