js网站问候语代码

        <span class="saying">
          <script language="javaScript" >
            now = new Date(),hour = now.getHours()
            if (hour<6){document.write(" 早上好！同学！")}
            else if (hour<9){document.write("早上好，同学们！")}
            else if (hour<12){document.write("上午好，同学们!")}
            else if (hour<14){document.write("中午好，同学们！")}
            else if (hour<17){document.write("下午好！同学们！")}
            else if (hour<19){document.write("傍晚好！同学们！")}
            else if (hour<22){document.write("晚上好！同学们！")}
            else {document.write("夜深了，学习注意眼睛哦！")}
            </script>
            </span>