Get xml value based on another value in javascript -

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i have gml looks this:

<gml:featuremember>     <a:location>abcd</a:location>     <a:elevatedpoint>         <gml:pos>44.0 1.2</gml:pos>         <a:elevation uom="ft">23</a:elevation>     </a:elevatedpoint> </gml:featuremember> <gml:featuremember>     <a:location>efjh</a:location>     <a:elevatedpoint>         <gml:pos>33.3 -6.9</gml:pos>         <a:elevation uom="ft">244</a:elevation>     </a:elevatedpoint> </gml:featuremember>

i want gml:pos based on value of a:location. example, want position related location abcd. i'm guessing using xpath way forward not sure start.

any appreciated. let me know if need more information.

update

this i've go far:

var positions = document.evaluate("/featuremember/location[abcd]/elevatedpoint/pos", xml, null, xpathresult.any_type, null);

never used xpath on gml, i'd do:

/featuremember/location[desired_value]/elevatedpoint/pos

keep in mind xml xpath syntax , have no idea how has gml, , return positions of nodes correct location.


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