refresh

refresh()
{
    if [[ "_${1}" != "_" ]]
    then
        eval \${CMD_ECHO} \${OPT_ECHO} \"\${${1}}\"
    else
        ${CMD_ECHO} ${OPT_ECHO} "${BUF_SCREEN}"
        BUF_TOT="${BUF_TOT}${BUF_SCREEN}"
        BUF_SCREEN=""
    fi
    return 0
}