javascript一段时间代码

<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>
今天是
<SCRIPT language=JavaScript><!--
var dayNames = new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六");
Stamp = new Date();
document.write("" + Stamp.getYear() + "年"+(Stamp.getMonth() + 1) +"月"+Stamp.getDate()+ "日"+ "");
//--></SCRIPT>