document.getElementById not working at FBJS

Posted by Willy on Stack Overflow See other posts from Stack Overflow or by Willy
Published on 2010-04-10T13:56:29Z Indexed on 2010/04/10 19:43 UTC
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fbjs

I'm developing apps at Facebook using FBML and FBJS. When I tried to use document.getElementById to read tag, it did not reply the correct value. Can we really use this command on FBML to get data?

Here is detail of my code :

<input type="hidden" value="123" id="number"/>
<a href="#" onclick="new Dialog().showMessage('Dialog', document.getElementById('number').value);return false"/>

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