📄 dom_loadxmldoc.asp@output=print
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<title>XML DOM Parser</title>
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
<h1>XML DOM Load Function</h1>
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<p class="intro">
The code for loading XML documents can be stored in a function.</p>
<p class="intro">The function described below, is used in all examples in this tutorial.</p>
<hr />
<h2>An XML Load Function - loadXMLDoc()</h2>
<p>The XML DOM contains methods (functions) to traverse XML trees, access,
insert, and delete nodes.</p>
<p>However, before an XML document can be accessed and manipulated, it must be
loaded into an XML DOM object.</p>
<p>The previous chapter demonstrated how to load XML documents. To make it
simpler to maintain this code, it should be written as a function: </p>
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<tr><td>
<pre>function loadXMLDoc(dname)
{
try //Internet Explorer
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
}
catch(e)
{
try //Firefox, Mozilla, Opera, etc.
{
xmlDoc=document.implementation.createDocument("","",null);
}
catch(e) {alert(e.message)}
}
try
{
xmlDoc.async=false;
xmlDoc.load(dname);
return(xmlDoc);
}
catch(e) {alert(e.message)}
return(null);
}
</pre>
</td></tr>
</table>
<p>The function above can be stored in the <head> section of an HTML page, and
called from a script in the page.</p>
<p><a target="_blank" href="tryit.asp@filename=try_dom_loadxmldoc">Try it yourself</a></p>
<hr />
<h2>An External Load Function</h2>
<p>To make the function above even easier to maintain, and to make sure the same
code is used in all pages, it can be stored in an external file.</p>
<p>We have called the file "loadxmldoc.js"</p>
<p>The file can be loaded in the <head> section of an HTML page, and loadXMLDoc()
can be called from a script in the page:</p>
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<tr><td>
<pre><html>
<head>
<script type="text/javascript" src="loadxmldoc.js">
</script>
</head>
<body>
<script type="text/javascript">
xmlDoc=loadXMLDoc("books.xml");
document.write("xmlDoc is loaded, ready for use");
</script>
</body>
</html></pre>
</td></tr>
</table>
<p><a target="_blank" href="tryit.asp@filename=try_dom_loadxmldoc2">Try it
yourself</a></p>
<p><img border="0" src="../images/lamp.gif" width="15" height="15" alt="lamp" />
<b>The function described above, is used in all examples in this
tutorial</b></p>
<hr />
<h2>An XML Load Function - loadXMLString()</h2>
<p>A similar function can be used to load an XML string (instead an XML file):</p>
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<tr><td>
<pre>function loadXMLString(txt)
{
try //Internet Explorer
{
xmlDoc=new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async="false";
xmlDoc.loadXML(txt);
return(xmlDoc);
}
catch(e)
{
try //Firefox, Mozilla, Opera, etc.
{
parser=new DOMParser();
xmlDoc=parser.parseFromString(txt,"text/xml");
return(xmlDoc);
}
catch(e) {alert(e.message)}
}
return(null);
}
</pre>
</td></tr>
</table>
<p>To make the function above easier to maintain, and to make sure the same
code is used in all pages, it can be stored in an external file.</p>
<p>We have stored in in a file called "loadxmlstring.js".</p>
<p><a target="_blank" href="tryit.asp@filename=try_dom_loadxmlstring">Try it yourself</a></p>
<hr />
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<p>From <b>http://www.w3schools.com</b> (Copyright Refsnes Data)</p>
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