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<h1>XML DOM compareDocumentPosition() Method</h1><hr />
<a href="dom_node.asp"><img class="navup" src="../images/up.gif" alt="Node Object Reference" border="0" /> Complete Node Object Reference</a>
<hr />
<h2>Definition and Usage</h2>
<p>The compareDocumentPosition() method compares the document position of the
current node, with a specified node, according to the document order.</p>
<h2>Syntax</h2>
<table class="ex" cellspacing="0" border="1" width="100%" id="table36">
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<td>
<pre>nodeObject.compareDocumentPostition(node)</pre>
</td>
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<table class="ex" cellspacing="0" border="1" width="100%" cellpadding="3" id="table37">
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<th align="left" valign="top" width="20%">Parameter</th>
<th align="left" valign="top" width="80%">Description</th>
</tr>
<tr>
<td valign="top">node</td>
<td valign="top">Required. Specifies the node to compare with the current
node</td>
</tr>
</table>
<hr />
<h2>Example</h2>
<p>The following code fragment loads "<a target="_blank" href="books.xml">books.xml</a>"
into xmlDoc using <a href="dom_loadxmldoc.asp">
loadXMLDoc()</a> and compares the document position of the first and
the third <book> element:</p>
<table class="ex" id="table43" border="1" cellspacing="0" width="100%">
<tr>
<td>
<pre>xmlDoc=loadXMLDoc("books.xml");</pre>
<pre>x=xmlDoc.getElementsByTagName('book')[0];
y=xmlDoc.getElementsByTagName('book')[2];</pre>
<pre>document.write(x.compareDocumentPosition(y));</pre>
</td>
</tr>
</table>
<p>Output:</p>
<table class="ex" id="table44" border="1" cellspacing="0" width="100%">
<tr>
<td>
<pre>4</pre>
</td>
</tr>
</table>
<p>Firefox, and most other browsers, will treat empty white-spaces or new lines
as text nodes, Internet Explorer will not. So, in the example above, Mozilla
browsers will output 4, while Internet Explorer will output 2.</p>
<p>To read more about the differences between browsers, visit our
<a href="dom_mozilla_vs_ie.asp">DOM Browsers</a> chapter in our XML DOM
Tutorial.<br />
</p>
<hr />
<h2>Try-It-Yourself Demos</h2>
<p>
<a target="_blank" href="tryit.asp@filename=try_dom_element_comparedocumentposition">
compareDocumentPosition() - Compare the document position of two nodes</a></p>
<hr />
<a href="dom_node.asp"><img class="navup" src="../images/up.gif" alt="Node Object Reference" border="0" /> Complete Node Object Reference</a>
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