var slice = Array.prototype.slice

function iterativelyWalk(nodes, cb) {
    nodes = slice.call(nodes)

    while(nodes.length) {
        var node = nodes.shift(),
            ret = cb(node)

        if (ret) {
            return ret
        }

        if (node.childNodes.length) {
            nodes = slice.call(node.childNodes).concat(nodes)
        }
    }
}