Help me on onclick function

[selvi]

Hi ,
I have zimlet XML also my javascript file are as follows , and i want when click (may be single click or double click) on zimlet panel item it should directly go to that url page.
But i couldn't get it .
<zimlet name="com_zimbra_jspsample" version="1.0" description="JSPSample">
<include>sample.js</include>
<contentObject>
<onClick>
<canvas type="window"/>
<actionUrl target="http://61.95.200.42/../chatapp"/>
</onClick>
</contentObject>


<zimletPanelItem label="Collabo chat">
<toolTipText>
Drag'n'Drop a contact here to send props to the discussion forum
</toolTipText>

<doubleClicked>
<canvas type="window"/>
<actionUrl method="get" target="http://61.95.200.42/../chatapp"/>
</doubleClicked>
</zimletPanelItem>

JavaScript code::

function Com_zimbra_jspsample() {
}

com_zimbra_jspsample.prototype = new ZmZimletBase();
Com_zimbra_jspsample.prototype.constructor = Com_zimbra_jspsample;

// Called by the Zimbra framework when the panel item was double clicked
Com_zimbra_jspsample.prototype.doubleClicked = function() {
this.singleClicked();
};

// Called by the Zimbra framework when the panel item was clicked
Com_zimbra_jspsample.prototype.singleClicked = function() {
var props = [ "toolbar=yes,location=yes,status=yes,menubar=yes,s crollbars=yes,resizable=yes,width=800,height=600" ];
props = props.join(",");
var url = "http://61.95.200.42/../chatapp";
window.open(url,props);
}

Please suggest me where i have done mistakes and what should i do !!
I need help immediately please!

Cheers,
selvi.