[Dmitriyff]

как-то так

var f = function(nodes) {

	var	node, 
		stack = [];

	stack.push(nodes)

	while (stack.length) {

		node = stack.pop();

		if (node.childNodes.length) {

			var i = node.childNodes.length;

			while(i--) stack.push(node.childNodes[i]);
		} else {
			console.log(node);
		}
	}
}