Get ChildNode of a Node

[Vitantonio]

HI,
How i get the childNode of a node ?

I do:

node.childNodes;

$.each(nodeChild, function () {
        nodeValue = treeOffices.dataItem(this).Id;
        if (nodeValue == id) {
            node = this;
            return node;
        }
    });

but treeOffices.dataItem(this) return always the firstNode

Help me