search node in tree javascript

1var stack = [], node, ii;
2stack.push(root);
3
4while (stack.length > 0) {
5    node = stack.pop();
6    if (node.title == 'randomNode_1') {
7        // Found it!
8        return node;
9    } else if (node.children && node.children.length) {
10        for (ii = 0; ii < node.children.length; ii += 1) {
11            stack.push(node.children[ii]);
12        }
13    }
14}
15
16// Didn't find it. Return null.
17return null;