How to find a specific tag in XML using Javascript

I want to find a specific tag in XML using javascript, for example: I want to find a tag which name is "table" and that tag can be at any place in the XML

XML is:

<chater>
    <info>
        <table>
        ........
        </table>
    </info>
    <contetnt>
        <table>
        ........
        </table>
    </contetnt>
</chater>

anybody suggest any idea for this

Thanks