now = new Date(),hour = now.getHours() 
if(hour < 6){document.write("夜深了,注意身体哦^_^！")} 
else if (hour < 9){document.write("早上好！保持一个好心情")} 
else if (hour < 12){document.write("上午好！工作学习不要耽误喔！")} 
else if (hour < 14){document.write("中午好！不需要休息一下吗？")} 
else if (hour < 17){document.write("下午好！晚上吃什么呢？")} 
else if (hour < 19){document.write("傍晚好！")} 
else if (hour < 22){document.write("晚上好！现在是上网的大好时光喔")} 
else {document.write("夜里好！早点休息啊")}