pu() { pW[0]=`pwd`;
	[ -d "${1-$home}" ] || set `grep "$1" $home/.prefs/dirs.$hostname`>/dev/null
	cd "${1-$home}"&&cd "$PWD"&&set -A pW "$PWD" "${pW[@]}"
	echo "${pW[@]}"
	xtitle "$hostname:${tty-}:$pW"; }