onclick event is not triggered
<p>Code:</p>

<p>corresponding function does not executed when clicked</p>

<pre><code>&lt;body onload="initialize('2.44','12.331')" onunload="triggerUnLoad()"&gt;
        &lt;select&gt;
            &lt;option onclick="initialize('2.44331','2.442211')"&gt;-sel places-&lt;/option&gt;
            &lt;option onclick="initialize('1.2','1.8')"&gt;china&lt;/option&gt;
            &lt;option onclick="initialize('1.3','1.2')"&gt;brazil&lt;/option&gt;        
            &lt;option onclick="initialize('1.4','13.3')"&gt;australia&lt;/option&gt;
        &lt;/select&gt;
</code></pre>

<p><code>Onclick</code> function is not working</p>
