<script language="JavaScript"> day = new Date(); hour = day.getHours(); if (hour>=5 && hour<12) greeting = "Доброе утро"; else { if (hour>=12 && hour<18) greeting = "Добрый день"; else { if (hour>=18 && hour<24) greeting = "Добрый вечер"; else { if (hour>=0 && hour<5) greeting = "Доброй ночи"; } } } document.write(greeting); </script>