selecting data from xml file in javascript

Question

i want to select just two items from xml file with itemno and quantity that have less prices.can anybody help me how to do this in javascript.

items.xml:

<?xml version="1.0"?>
<items>
    <item>
        <itemno>1</itemno>
        <unitprice>99</unitprice>
        <Quantity>10</Quantity>
    </item>
    <item>
        <itemno>2</itemno>
        <unitprice>80</unitprice>
        <Quantity>10</Quantity>
    </item>
    <item>
        <itemno>3</itemno>
        <unitprice>120</unitprice>
        <Quantity>10</Quantity>
    </item>
</items>

javascript:

var xmlDoc=new ActiveXObject("MSXML.DOMDocument");
xmlDoc.async="false";
xmlDoc.load("items.xml");
var items=xmlDoc.documentElement;
var item = itemss.childNodes(0);

dupe of stackoverflow.com/questions/4200913/xml-to-javascript-object — Adam Bergmark
– Adam Bergmark, Commented May 20, 2011 at 22:44
What do you mean by "associative array" then? The term doesn't exist in js. — Adam Bergmark
– Adam Bergmark, Commented May 20, 2011 at 22:48
@Adam Bergmark ok.i have used associative array and ksort for this example in php , which works correctly but now i want to do this in javascript... — bina
– bina, Commented May 20, 2011 at 22:51

hugomg · Accepted Answer · 2011-05-21 02:02:12Z

All of the basic DOM methods also work for XML:

http://www.quirksmode.org/dom/w3c_core.html
https://developer.mozilla.org/en/DOM/document
https://developer.mozilla.org/en/DOM/element

You can find all items using

items = xmlDoc.getElementsByTagName('item');

For each item, one of the children is the cost node:

priceNode = item.childNodes[1];

(Or you could go through the childnodes, looking for the one with nodeName equal to "UNITPRICE")

Looking for the content of the node is trickier, since IE and FF support different methods:

priceStr =  priceStr.textContent || priceNode.innerText;

Finally, to convert a string into a number:

price = parseInt(priceStr, 10);

By the way, your way of building a XML document with ActiveX is IE specific. You should definitely look into using some sort of Javascript library (such as Jquery or Dojo) to smooth this and other things out.

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