Discuz!X1.5 版本template/default/common/head_common.htm 文件中：

  1. <title><!--{if
    !empty($navtitle)}-->$navtitle - <!--{/if}--><!--{if
    empty($nobbname)}--> $_G['setting']['bbname'] - <!--{/if}-->
    Powered by Discuz!</title><?xml:namespace prefix = o ns =
    "urn:schemas-microsoft-com:office:office" />
  2. <meta name="keywords" content="{if
    !empty($metakeywords)}{echo htmlspecialchars($metakeywords)}{/if}" />
  3.          <meta name="description" content="{if
    !empty($metadescription)}{echo htmlspecialchars($metadescription)}
    {/if},$_G['setting']['bbname']" />

title部分和keywords、discription。在后台中的 搜索引擎优化设置

$_G['setting']['seohead']
对应后台的其他头部信息设置

这代码是对样式文件的加载<!--{csstemplate}-->

  1. <script type="text/javascript">var STYLEID =
    '{STYLEID}', STATICURL = '{STATICURL}', IMGDIR = '{IMGDIR}', VERHASH =
    '{VERHASH}', charset = '{CHARSET}', discuz_uid = '$_G[uid]', cookiepre =
    '{$_G[config][cookie][cookiepre]}', cookiedomain =
    '{$_G[config][cookie][cookiedomain]}', cookiepath =
    '{$_G[config][cookie][cookiepath]}', showusercard =
    '{$_G[setting][showusercard]}', attackevasive =
    '{$_G[config][security][attackevasive]}', disallowfloat =
    '{$_G[setting][disallowfloat]}', creditnotice = '<!--{if
    $_G['setting']['creditnotice']}-->$_G['setting']['creditnames']<!--{/if}-->',
    defaultstyle = '$_G[style][defaultextstyle]', REPORTURL =
    '$_G[currenturl_encode]', SITEURL =
    '$_G[siteurl]';</script><?xml:namespace prefix = o ns =
    "urn:schemas-microsoft-com:office:office" />

初始化必要的js变量

  1. <script
    type="text/javascript"
    src="{$_G[setting][jspath]}common.js?{VERHASH}"></script>

加载 common.js

template/default/common/header.htm
从第 1 行至 20 行
通过判断加载相应的 js 和 css 文件

template/default/common/header_diy.htm
用于显示 diy 时候基本页面
template/default/common/footer.htm

  1. <!--{if $_GET['diy'] ==
    'yes' && ($_G[mod] == 'topic' || $_G[group][allowdiy])
    && (empty($do) || $do != 'index') &&
    !empty($_G['style']['tplfile'])}-->
  2. <script type="text/javascript"
    src="{$_G[setting][jspath]}common_diy.js?{VERHASH}"></script>
  3. <script type="text/javascript"
    src="{$_G[setting][jspath]}portal_diy.js?{VERHASH}"></script>
  4. <!--{/if}-->
  5. <!--{if $_GET['diy'] == 'yes' && $space['self']
    && $_G[mod] == 'space' && $do == 'index'}-->
  6. <script type="text/javascript"
    src="{$_G[setting][jspath]}common_diy.js?{VERHASH}"></script>
  7. <script type="text/javascript"
    src="{$_G[setting][jspath]}space_diy.js?{VERHASH}"></script>
  8. <!--{/if}-->
  9. <!--{if $_G['member']['newprompt'] &&
    (empty($_G['cookie']['promptstate_'.$_G[uid]]) ||
    $_G['cookie']['promptstate_'.$_G[uid]] != $_G['member']['newprompt'])
    && $_G['gp_do'] != 'notice'}-->
  10. <script
    type="text/javascript">noticeTitle();</script>
  11. <!--{/if}-->
  12. <!--{eval output();}-->

这部分代码是 diy 时候必要的，如果缺少将不能 diy

template/default/common/footer_ajax.htm 和 template/default/common/fooer_ajax.htm
配合着使用，请尽量不要更改