[jQuery] XML Parsing: Getting a node value

[Arun Kumar]

I have the following XML File:

<A>
    <os:TestTag>10</os:TestTag>
    <B>JSHDHSKJAD</B>
</A>

I want to get the tag os:TestTag value. I am using the following query
(This XML is in xmlDoc variable).

$("A", xmlDoc).find("os:TestTag").text();

The above query is not working, So I tried the below one:
$("A", xmlDoc).find("TestTag").text();

But no use.
How can I get that node value?