按時間段問好的JS代碼

<span>
        <script type="text/javascript">
            var now=(new Date()).getHours();
   if(now>0&&now<=6){
    document.write("午夜好，");
   }else if(now>6&&now<=11){
    document.write("早上好，");
   }else if(now>11&&now<=14){
    document.write("中午好，");
   }else if(now>14&&now<=18){
    document.write("下午好，");
   }else{
    document.write("晚上好，");
   }
   </script>
</span>

某某某。