LOGDIR=/app/log

    echo "Please type the Log Directory : (current value: $LOGDIR)"
    read LOGDIR

readDefault()
{
    ARGS=""
    N=1
    LOCALBUF=""
    until  [ $N -eq $# ]
    do
        eval ARG=\${$N}
        ARGS=" $ARGS $ARG"
        N=`expr $N + 1`
    done
    read $ARGS LOCALBUF
    if [ -n "$LOCALBUF" ]
    then
        VARNAME=${!#}
        export $VARNAME=$LOCALBUF
    else
        echo "Using current value."
    fi
}