[flexcoders] Scan thru XML

[markgoldin_2000]

I have the follwing xml:
<curtrainblockscars>
  <train_id>2</train_id> 
  <location>West Class</location> 
  <bnumber1>440</bnumber1> 
  <carsb1>9</carsb1> 
  <bnumber2>430</bnumber2> 
  <carsb2>36</carsb2> 
 </curtrainblockscars>
How can scan it for elements with a specific name(not value), for 
example: bnumber1?

Thanks