[flexcoders] Working with selectedItem

[markgoldin_2000]

My ListGrid's selectedItem looks like this:

<consistpersonnel1>
  <id>
    0
  </id>
  <consistnum>
    0
  </consistnum>
  <header_id>
    0
  </header_id>
  <person/>
  <name/>
  <worknum/>
</consistpersonnel1>

trace(xmlNew["id"]) shows 0, but trace(xmlNew["person"]) shows 
nothing. How can I check if "person" has any value then?

Thanks