cd () {

    emulate -LR zsh

    if [[ $# -ge 3 ]]; then
        echo cd: too many arguments >&2
        return 1
    elif [[ $# -eq 2 ]]; then
        ## builtin cd $1 $2
        local newdir=${(S)PWD//$1/$2}
        echo $newdir
        builtin cd $newdir
    elif [[ $# -eq 1 ]]; then
        if [[ ! -d $1 && -d $1:h ]]; then
            echo $1:h
            builtin cd $1:h
        else
            builtin cd $1
        fi
    else
        builtin cd
        fi
}