Parse XML formatted String

Hi All,
I have a string field that is formatted in XML format. What I want to be able to do is pull a specific element from the xml formatted string.
Example string:
<customer><name>john</name><id>25636</id></customer>
I want to retreive just the id number of 25636 from this string.
I would I go about accomplishing this?
Thank you in advance,

I fixed it on my own.
Here' s my answer for others that may need it:
if(instr({field.xmlstring},'</id>') - instr({field.xmlstring},'<id>') = 7)then
   mid(totext({field.xmlstring}),instr({field.xmlstring},'<id>')+4,3)
else if(instr({field.xmlstring},'</id>') - instr({field.xmlstring},'<id>') = 8)then
   mid(totext({field.xmlstring}),instr({field.xmlstring},'<id>')+4,4)
else if(instr({field.xmlstring},'</id>') - instr({field.xmlstring},'<id>') = 9)then
   mid(totext({field.xmlstring}),instr({field.xmlstring},'<id>')+4,5)
I use the conditions to cover all possible lengths of the id number.

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