dom_nodes_add.asp

W3Schools tutorial..web designing

<h2>Insert a Node - insertBefore()</h2>
<p>The insertBefore() method is used to insert a node before a specified child node.</p>
<p>This method is useful when the position of the added node is important:</p>
<table width="100%" border="1" class="ex" cellspacing="0" id="table23">
<tr><td>
<pre>xmlDoc=loadXMLDoc(&quot;books.xml&quot;);</pre>
<pre>newNode=xmlDoc.createElement(&quot;book&quot;);</pre>
<pre>x=xmlDoc.documentElement;
y=xmlDoc.getElementsByTagName(&quot;book&quot;)[3];</pre>
<pre>x.insertBefore(newNode,y);</pre>
</td></tr>
</table>

<p>Example explained:</p>
<ol>
	<li>Load &quot;<a target="_blank" href="books.xml">books.xml</a>&quot; 
	into xmlDoc using <a href="dom_loadxmldoc.asp">loadXMLDoc()</a> </li>
	<li>Create a new element node &lt;book&gt;</li>
	<li>Insert the new node in front of the last &lt;book&gt; element node</li>
</ol>
<p><a target="_blank" href="tryit.asp@filename=try_dom_insertbefore">Try it 
yourself</a></p>
<p>If the second parameter of insertBefore() is null, the new node will be added 
after the last existing child node.</p>
<p><b>x.insertBefore(newNode,null)</b> and <b>x.appendChild(newNode)</b> will 
both append a new child node to x.</p>
<hr />

<h2>Add a New Attribute</h2>
<p>There is no method called addAtribute().</p>
<p>The setAttribute() method creates a new attribute if the attribute does 
not exist:</p>
<table class="ex" id="table26" border="1" cellspacing="0" width="100%">
	<tr>
		<td>
		<pre>xmlDoc=loadXMLDoc(&quot;books.xml&quot;);</pre>
		<pre>x=xmlDoc.getElementsByTagName('book');
x[0].setAttribute(&quot;edition&quot;,&quot;first&quot;);</pre>
		</td>
	</tr>
</table>
<p>Example explained:</p>
<ol>
	<li>Load &quot;<a target="_blank" href="books.xml">books.xml</a>&quot; 
	into xmlDoc using <a href="dom_loadxmldoc.asp">loadXMLDoc()</a> </li>
	<li>Set (create) the attribute &quot;edition&quot; with the value &quot;first&quot; 
	for the first &lt;book&gt; element</li>
</ol>
<p><a target="_blank" href="tryit.asp@filename=try_dom_createattribute3">Try 
it yourself</a></p>
<p><b>Note:</b> If the attribute already exists, the setAttribute() 
method will overwrite the existing value.</p>
<hr />

<h2>Add Text to a Text Node - insertData()</h2>
<p>The insertData() method inserts data into an existing 
text node.</p>
<p>The insertData() method has two parameters:</p>
<ul>
	<li>offset - Where to begin inserting characters (starts at zero)</li>
	<li>string - The string to insert</li>
</ul>
<p>The following code fragment will add &quot;Easy&quot; to the text 
node of the first 
&lt;title&gt; 
element of the loaded XML:</p>

<table width="100%" border="1" class="ex" cellspacing="0" id="table22">
<tr><td>
<pre>xmlDoc=loadXMLDoc(&quot;books.xml&quot;);</pre>
<pre>x=xmlDoc.getElementsByTagName(&quot;title&quot;)[0].childNodes[0];</pre>
<pre>x.insertData(0,&quot;Easy &quot;);</pre>
</td></tr>
</table>
<p><a target="_blank" href="tryit.asp@filename=try_dom_insertdata">Try it yourself</a></p>
<hr />

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