another javascript copy question
<p>The original json</p>

<pre><code>var json = 
  [{ "LABEL":"foo1", "DATA":340020, "BAR":235 },
   { "LABEL":"foo2", "DATA":140084, "BAR":330 },
   { "LABEL":"fooN", "DATA":126489, "BAR":120 }];
</code></pre>

<p><br/>
Below the desired format, where new <code>DATA</code> corresponds to old <code>BAR</code></p>

<pre><code>  [{ "LABEL":"foo1", "DATA":235 },
   { "LABEL":"foo2", "DATA":330 },
   { "LABEL":"fooN", "DATA":120 }];
</code></pre>
