javascript实现根据时间段显示问候语的方法

<script language="javaScript">
<!--
now = new Date(),hour = now.getHours()
if(hour < 6){document.write("凌晨好!")}
else if (hour < 9){document.write("早上好!")}
else if (hour < 12){document.write("上午好!")}
else if (hour < 14){document.write("中午好!")}
else if (hour < 17){document.write("下午好!")}
else if (hour < 19){document.write("傍晚好!")}
else if (hour < 22){document.write("晚上好!")}
else {document.write("夜里好!")}
// -->
</script>