Cant seem to get XML node value..

[chelnov63]

hi everyone this is my XML which I am loading in with javascript:

 

<?xml version="1.0" encoding="utf-8"?>
<config>
<config>
	<config id="annualMileage"><![CDATA[10000]]></config>
	<config id="petrolPrice"><![CDATA[97.5]]></config>
	<config id="thumbnailPath"><![CDATA[images/]]></config>
</config>
        <content>
	<!-- data view  -->
	<text id="saving_power"><![CDATA[{moreless} Power]]></text>
	<text id="saving_mileage"><![CDATA[{moreless} Efficiency]]></text>
</content>
</config>

 

Now the XML loads succesfully into an xml object XMLDoc ... however I am trying to retrieve the value of petrolPrice ..but I can't seem to get the path to it correct:

 

//by this point XMLDoc does contain the XML data

var petrol_price = XMLDoc.getElementsByTagName("config")[0].childNodes[0].childNodes[1].firstChild.nodeValue;

alert(petrol_price);

 

Have I got the path wrong? thanks in advance for your help

 

[broseph]

Well, for starters you seem to have two nodes named the same thing, perhaps that is confusing it?

[chelnov63]

Thanks i would love to change it - but i dont have access to the XML file - and it wont change since it has other dependants    .. do you think that is the problem?

[broseph]

yes i really do think that is the problem.  you have 3 nodes with identical names.

 

<node>
  <node>
    <node/>
    <node/>
  </node>
</node>

 

look up the documentation for

 

getElementsByTagName()

 

and see what it says about what node it will give you a reference to when you have multiple nodes with the same name

[salathe]

Have I got the path wrong? thanks in advance for your help

The whitespace nodes between the normal nodes (config, etc.) still count as nodes when you're traversing through the childNodes collections.  The following (untested) should be what you're after:

var petrol_price = XMLDoc.getElementsByTagName("config")[0].childNodes[1].childNodes[3].firstChild.nodeValue;