PTCMS老版本如何实现阅读分页

PTCMS3.0版本 阅读页面如何实现文章按照字数自动分页。恳请帮助 有偿。

<!doctype html>
<html lang="zh-cn">
<head>
    <meta charset="utf-8">
    <title>{$tkd.title|parseTPL}</title>
    <meta name="keywords" content="{$tkd.keywords|parseTPL}" />
    <meta name="description" content="{$tkd.description|parsetpl}" />
    <meta name="viewport" id="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <meta name="apple-mobile-web-app-status-bar-style" content="black" />
    <meta name="wap-font-scale" content="no" />
    <link href="/skin/css/mc.css" rel="stylesheet" type="text/css" />
    <script type="text/javascript" src="/skin/js/jquery.min.js"></script>
    <script type="text/javascript" src="/skin/js/jquery.cookie.js"></script>
    <script src="/skin/js/mc.js" type="text/javascript"></script>
    <meta http-equiv="Cache-Control" content="no-transform" />
    <meta http-equiv="Cache-Control" content="no-siteapp" />
    <meta name="applicable-device" content="mobile"/>
    <meta name="MobileOptimized" content="width"/>
    <meta name="HandheldFriendly" content="true"/>
    </head>
<body class="readbg" id="readbg">
<div class="wrapper font-large" id="wrapper">
    <div class="read-top">
        <h1 class="title">{$novel.name}  {$chapter.name}</h1>
    </div>
    <div class="content">
        <div class="nr_page">
            <table cellpadding="0" cellspacing="0" class="" style="">
                <tr>
                    <td class="prev"><a id="pb_prev" href = "{$chapter.preinfo.url}" title = "上一章 {$chapter.preinfo.name}">上一章</a></td>
                    <td class="mulu"><a href="/">首页</a></td>
                    <td class="mulu"><a id="pb_mulu" href="{$url.dir}">目录</a></td>
                    <td class="next"><a id="pb_next" href = "{$chapter.nextinfo.url}" title = "下一章 {$chapter.nextinfo.name}">下一章</a></td>
                </tr>
            </table>
        </div>
        <div class="articleinfo clearfix">
                    <span class="xialas">换源:</span>
            <div id="xiala">
                <div class="xiala_con">
                    <div class="d_out" onmouseout="this.className='d_out'" onmouseover="this.className='d_over'">
                        <div class="d_menu" onclick="$('#changsource > div ').show();">{$chapter.sitename}</div>
                    </div>
                </div>
            </div>
            <div class="toolbar clearfix">
                   <div class="option theme">
                  <div class="theme-area theme-default" id="theme2">
                        <div class="ptm-btn theme-bg"></div>
                    </div>

                </div>

                 <a href="javascript:;" class="pattern menu-moon" id="mode"></a>
                <a href="javascript:;" class="aminus font_dec" id="font_dec"></a>
                <a href="javascript:;" class="aadd font_inc" id="font_inc"></a>
            </div>
        </div>
        <div id="articlecon" class="articlecon">
        {$chapter.content|br2p}
        </div>
        <script>eweq_rqssdf();</script>
        <div class=" nr_page">
            <table cellpadding="0" cellspacing="0">
                <tr>
                    <td class="prev"><a id="pb_prev" href="{$chapter.preinfo.url}">上一章</a></td>
                    <td class="mulu"><a href="{$url.addmark}">书签</a></td>
                    <td class="mulu"><a id="pb_mulu" href="{$url.info}">目录</a></td>
                    <td class="next"><a id="pb_next" href="{$chapter.nextinfo.url}">下一章</a></td>
                </tr>
            </table>
        </div>
        <script>cccrrr2();</script>
        <br/>
                        <div class="lm">推荐阅读:{block method="novellist" name="list" sort="monthvisit" num=10}
{section loop=$list}
<a href="{$loop.url.info}">{$loop.novel.name}</a>{/section}
            </div>
            <div class="lm">最新更新:{block method="novellist" name="list" sort="lastupdate" num=20 cachetime=120}
{section loop=$list}
<a href="{$loop.url.info}">{$loop.novel.name}</a>{/section}
            </div>
        <div id="foot" class="foot">
            <a href="/" title="笔趣阁">笔趣阁</a>&nbsp;&nbsp;<a href="/user/mark/index.html">我的书架</a>&nbsp;&nbsp;<a href="/user/history/index.html">浏览历史</a>
            <div style="display:none"></div>
        </div>
                             <div id="changsource" class="changsource ">
            <div class="over s_event"></div>
            <div class="ptm-card d_list s_event">
                <div class="ptm-card-header ptm-clearfix">
                    <div class="ptm-pull-left">本章换源阅读</div>
                    <div class="close ptm-pull-right" onclick="$('#changsource > div ').hide();">X</div>
                </div>
                <div class="ptm-card-content">
                    <ul class="pt-card pt-card-6">
                                            <li class="cur">
                            <div class="pt-novel">
                                <div class="pt-num ptm-pull-right"><a href="" title="{$novel.name} {$chapter.sitename}">{$chapter.sitename}</a></div>
                                <span class="pt-name"><a href="" class="ptm-text-grey" target="_self" title="{$novel.name} {$chapter.sitename} {$chapter.name}">{$chapter.name}</a></span>
                            </div>
                        </li>
                    {loop=$chapter.samelist}
                                                <li>
                            <div class="pt-novel">
                                <div class="pt-num ptm-pull-right"><a rel="nofollow" href="{$loop.url}" title="{$novel.name} {$loop.name} {$chapter.name}">{$loop.name}</a></div>
                                <span class="pt-name"><a rel="nofollow" href="{$loop.url}" class="ptm-text-grey" target="_self" title="{$novel.name} {$loop.name} {$chapter.name}">{$chapter.name}</a></span>
                            </div>
                        </li>
     {/loop}
    
                                            </ul>
                </div>
            </div>
        </div>  
            </div>
    <div class="footer">
        <p>本站系基于互联网搜索引擎技术为您提供信息检索服务。</p>
    </div>
</div>
<div style="display:none">
<script>
var _hmt = _hmt || [];
(function() {
  var hm = document.createElement("script");
  hm.src = "https://hm.baidu.com/hm.js?95b9d9dda434a13a09b0634ea5243780";
  var s = document.getElementsByTagName("script")[0]; 
  s.parentNode.insertBefore(hm, s);
})();
</script>
</div>
<script type="text/javascript">
    $(function(){
        $('#changsource .close').on('click', function(){
            $('#changsource > div ').hide();
        });
    });
</script>
<script>sdsq_bqweom();</script>
</body>
</html>

这是阅读页的HTML代码。如何实现按照文章字数自动增加分页呢?