I'm trying to display or hide a heading if there is a particular 
element in the xml.   My xml looks like this:

<element>Chem</element>
<component>C</component>
<value>398</value>

If there is an element of "Chem", the component and value will display 
in HTML under a heading entitled "Chemistry".  If there isn't an 
element of "Chem", I don't want the "Chemistry" heading to display.

What's the best way to achieve this?

Thanks.


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