OS X simple mouse acceleration switch

mouse_acc.bash

mouse_acc () {
    if [ $1 = "enable" ]
    then
        echo "Mouse Acceleration Enabled; Log back in please;"
        defaults write .GlobalPreferences com.apple.mouse.scaling 0
    elif [ $1  = "disable" ]
    then
        echo "Mouse Acceleration Disabled; Log back in please;"
        defaults write .GlobalPreferences com.apple.mouse.scaling -1
    else
        echo "Current mouse acceleration is:" \
            `defaults read .GlobalPreferences com.apple.mouse.scaling`
    fi
}