Use self-hosted JavaScript libraries

Add iFrameResizer for when the publication lists are included via an
iframe.
Add self-hosted copies of jQuery and MathJax.
Fix some styling in the code and in the HTML via CSS

bibtexbrowser.local.php

@@ -4,6 +4,10 @@ bibtexbrowser_configure('ABBRV_TYPE','key');
 bibtexbrowser_configure('BIBTEXBROWSER_LAYOUT','table');
 // URL to individual files
 bibtexbrowser_configure('BIBTEXBROWSER_URL',"https://publications.zrd-saar.de/");
+// URL to jQuery
+bibtexbrowser_configure('JQUERY_URI', '/static/jquery-3.6.4.min.js');
+// URL to MathJax
+bibtexbrowser_configure('MATHJAX_URI', '/static/TeX-AMS_HTML.V2.7.1.js');
 // target for links
 bibtexbrowser_configure('BIBTEXBROWSER_LINKS_TARGET','_blank');
 // use IEEE Transactions-like style, e.g. puts authors in front of title
@@ -37,4 +41,23 @@ bibtexbrowser_configure('BIBTEXBROWSER_URL_BUILDER', 'url_builder_static');
 function url_builder_static($bibentry) {
 	return BIBTEXBROWSER_URL.'keys/'.$bibentry->getKey().'.html';
 }
-?>
+
+// A custom function for the MathJax footer to use the static URL instead of the CDN one
+// Also include iframeResizer JS
+function javascript_math() {
+    ?>
+    <script>
+        MathJax = {
+            tex: {
+                inlineMath: [['$', '$'], ['\\(', '\\)']]
+            }
+        };
+    </script>
+    <script type="text/javascript" id="MathJax-script" async src="/static/tex-mml-chtml.js">
+    </script>
+    <script type="text/javascript" id="iFrameResizer" src="/static/iframe-resizer.child.js">
+    </script>
+    <?php
+}
+
+?>