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js根据时间显示信息

<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>

补充:网页制作,js教程 
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