replaceChild(n, oldChild); Node ns = n; n = ps;
replaceChild(n, oldChild); Node ns = n; n = ps;
replaceChild(n, oldChild); Node ns = n; n = ps;
replaceChild(n, oldChild); Node ns = n; n = ps;
replaceChild(n, oldChild); Node ns = n; n = ps;
replaceChild(n, oldChild); Node ns = n; n = ps;