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Re: Please help me understand this DOM thing

From: Martin Honnen <mahotrash@-----.-->
To: NULL
Date: 3/4/2008 3:57:00 PM

RC wrote:

> BTW, why DOM has firstChild, lastChild but doesn't have nextChild?

It has nextSibling and previousSibling so you could access the first 
child with var child = node.firstChild, then the next child with 
child.nextSibling. And you can loop through the childNodes collection.


> function recursiveRead(node) {
>     //alert(id);
>     if (! node.hasChildNodes()) {
>         alert(
>               "Node name = " + node.nodeName + "\n" +
>               "Node value = " + node.nodeValue + "\n" +
>               "Node type = " + node.nodeType + "\n" +
>               "Node id = " + node.id + "\n" +
>               "Node data = " + node.data + "\n"
>               );
>     } else {
>         nodeList = node.childNodes;
>         alert(nodeList.length);
>         for (var i = 0; i < nodeList.length; i++) {
>             aNode = nodeList[i];
>             recursiveRead(aNode);

It is generally a good idea to declare variables and use local 
variables, it becomes mandatory once you want to write recursive 
functions so use

else {
         var nodeList = node.childNodes;
         alert(nodeList.length);
         for (var i = 0; i < nodeList.length; i++) {
             var aNode = nodeList[i];
             recursiveRead(aNode);
         }

and your function should do what you want.


-- 

	Martin Honnen
	http://JavaScript.FAQTs.com/


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