set reqired base on value in a replicate field

syim

I'm having problem to get my following js work. I would like to set the "/page/portlet/marketing-offer/alt" field to be requried if, the "/page/portlet/marketing-offer/file" is not empty. However, the funciton setAltRequried does not see to get called at all. Any idea?

Followings are the js and DCT

=============================================================
function init() {
IWEventRegistry.addItemHandler("/page/portlet/marketing-offer/file", "onItemChange", setAltRequired);
}

function setAltRequired(item)
{
var file = item.getValue();
if (file != "")
{
IWDatacapture.getItem(item.getName() + "/../alt").setRequired(true);
}
else
{
IWDatacapture.getItem(item.getName() + "/../alt").setRequired(false);
}
}

init();
==========================================================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE data-capture-requirements SYSTEM "datacapture6.0.dtd">
<data-capture-requirements name="rates">
<ruleset name="dct">
<root-container name="page" location="page">
<container name="portlets" combination="or" min="0" max="4" default="0" location="portlet">
<label>Portlets</label>
<container name="marketing-offer" location="marketing-offer">
<label>Marketing (Offer Presentment)</label>
<item name="title" pathid="title">
<label>Title</label>
<text size="60"/>
</item>
<item name="file" pathid="file">
<label>Image</label>
<browser size="60" initial-dir="/SharedContent/images" />
</item>
<item name="alt" pathid="alt">
<label>Alt Text</label>
<description>Provide alternate text for this image.</description>
<text/>
</item>
<item name="content" pathid="content">
<label>Content</label>
<textarea required="t" rows="22" external-editor="visualformat" />
</item>
</container>
<container>
<script src="/iw/userscript/marketing_offer.js"/>
</ruleset>
</data-capture-requirements>

jbonifaci

portlets is plural in your DCT:

<container name="portlets" combination="or" min="0" max="4" default="0" location="portlet">

and singluar in your js:

IWEventRegistry.addItemHandler("/page/portlet/marketing-offer/file", "onItemChange", setAltRequired);

~Jeff