[cellarius]

Hm, those javascripts and stylesheets are called:

<!-- CSS Stylesheet -->
<style type="text/css" id="vbulletin_css">
/**
* vBulletin 3.8.0 CSS
* Style: 'Rom-Forum 2'; Style ID: 3
*/
@import url("clientscript/vbulletin_css/style-f93e095c-00003.css");
</style>
<link rel="stylesheet" type="text/css" href="clientscript/vbulletin_important.css?v=380" />

<!-- / CSS Stylesheet -->

<script type="text/javascript" src="clientscript/yui/yahoo-dom-event/yahoo-dom-event.js?v=380"></script>
<script type="text/javascript" src="clientscript/yui/connection/connection-min.js?v=380"></script>
<script type="text/javascript">
<!--
var SESSIONURL = "";
var SECURITYTOKEN = "1232907401-65ec3d17d2f5529672168f47cdfb6d8b7bb67fbd";
var IMGDIR_MISC = "http://www.roma-antiqua.de/forum/images/ra_misc";
var vb_disable_ajax = parseInt("0", 10);
// -->
</script>
<script type="text/javascript" src="clientscript/vbulletin_global.js?v=380"></script>
<script type="text/javascript" src="clientscript/vbulletin_menu.js?v=380"></script>

<link rel="alternate" type="application/rss+xml" title="Rom-Forum - Reise-Tipps & mehr RSS Feed" href="external.php?type=RSS2" />
  
<link rel="SHORTCUT ICON" href="/favicon.ico">
<link rel="STYLESHEET" type="text/css" href="/css/romaantiqua.css" />
<link rel="STYLESHEET" type="text/css" href="/css/menu.css" />

<script type="text/javascript">
function adjustIFrameSize (iframeWindow) {
  if (iframeWindow.document.height) {
    var iframeElement = document.getElementById
(iframeWindow.name);
    iframeElement.style.height = iframeWindow.document.height + 'px';
    iframeElement.style.width = iframeWindow.document.width + 'px';
  }
  else if (document.all) {
    var iframeElement = document.all[iframeWindow.name];
    if (iframeWindow.document.compatMode &&
        iframeWindow.document.compatMode != 'BackCompat')
    {
      iframeElement.style.height =
iframeWindow.document.documentElement.scrollHeight + 5 + 'px';
      iframeElement.style.width =
iframeWindow.document.documentElement.scrollWidth + 5 + 'px';
    }
    else {
      iframeElement.style.height =
iframeWindow.document.body.scrollHeight + 15 + 'px';
      iframeElement.style.width =
iframeWindow.document.body.scrollWidth + 15 + 'px';
    }
  }
}
</script>
<script language="JavaScript" type="text/javascript">
    function thumbpaste (codehtml, codebb) 
    {
        if (window.opener.vB_Editor['vB_Editor_QE_1'].wysiwyg_mode)
        {        
            window.opener.vB_Editor['vB_Editor_QE_1'].insert_text(codehtml);
window.opener.vB_Editor['vB_Editor_QE_1'].collapse_selection_end();
        }
        else
        {
            window.opener.vB_Editor['vB_Editor_QE_1'].insert_text(codebb);
window.opener.vB_Editor['vB_Editor_QE_1'].collapse_selection_end();
        }
        return;
    }
</script>
<script language="JavaScript" type="text/javascript">
    var editorsubmit = window.opener.document.getElementById('vB_Editor_QE_1_save');
    function fnCallback(e) { self.close(); }
    YAHOO.util.Event.addListener(editorsubmit, "click", fnCallback);
</script>
<script language="JavaScript" type="text/javascript">
    function copyclip (codehtml, codebb)
    {
        code = ;
        document.getElementById('codebox').value = code;
        clipboardData.setData('text', code);
    }
</script>

What I require in the php-script I already posted. I just cannot think what else I could include. Do you have any hints what I might try?