diff --git a/modules/purchase_trade/process_documentation.py b/modules/purchase_trade/process_documentation.py
index cafde12..0f1a74b 100644
--- a/modules/purchase_trade/process_documentation.py
+++ b/modules/purchase_trade/process_documentation.py
@@ -2,7 +2,6 @@
 # this repository contains the full copyright notices and license terms.
 import base64
 import html
-import json
 import mimetypes
 import os
 import posixpath
@@ -24,26 +23,39 @@ class ProcessDocumentation(ModelSingleton, ModelSQL, ModelView):
     content = fields.Function(fields.Text('Content'), 'get_content')
 
     def get_content(self, name):
-        pages = _documentation_pages()
         return HTML_TEMPLATE % {
-            'initial': pages.get('README.md', ''),
-            'pages': json.dumps(pages).replace('</', '<\\/'),
+            'content': _documentation_content(),
             }
 
 
-def _documentation_pages():
-    pages = {}
+def _documentation_content():
+    sections = []
+    index = DOCUMENTATION_ROOT / 'README.md'
+    if index.exists():
+        sections.append(_render_page(index))
+
     for path in sorted(DOCUMENTATION_ROOT.rglob('*.md')):
-        relative_name = _relative_name(path)
-        markdown = path.read_text(encoding='utf-8')
-        pages[relative_name] = _markdown_to_html(markdown, relative_name)
-    return pages
+        if path == index:
+            continue
+        sections.append(_render_page(path))
+    return '\n'.join(sections)
+
+
+def _render_page(path):
+    relative_name = _relative_name(path)
+    markdown = path.read_text(encoding='utf-8')
+    return '<section id="%s">%s</section>' % (
+        _anchor(relative_name), _markdown_to_html(markdown, relative_name))
 
 
 def _relative_name(path):
     return path.relative_to(DOCUMENTATION_ROOT.resolve()).as_posix()
 
 
+def _anchor(filename):
+    return 'doc-' + re.sub(r'[^a-zA-Z0-9_-]+', '-', filename)
+
+
 def _resolve_link(current_file, target):
     if target.startswith(('#', 'http://', 'https://', 'mailto:')):
         return target
@@ -81,8 +93,8 @@ def _inline(markdown, current_file):
             else:
                 parts.append(label)
         elif resolved.endswith('.md'):
-            parts.append('<a href="#" data-doc="%s">%s</a>' % (
-                    html.escape(resolved, quote=True), label))
+            parts.append('<a href="#%s">%s</a>' % (
+                    html.escape(_anchor(resolved), quote=True), label))
         elif resolved.startswith(('#', 'http://', 'https://', 'mailto:')):
             parts.append('<a href="%s">%s</a>' % (
                     html.escape(resolved, quote=True), label))
@@ -144,7 +156,7 @@ def _markdown_to_html(markdown, current_file):
 
     if current_file != 'README.md':
         body.insert(
-            0, '<p><a href="#" data-doc="README.md">Back to index</a></p>')
+            0, '<p><a href="#doc-README-md">Back to index</a></p>')
     return '\n'.join(body)
 
 
@@ -212,27 +224,7 @@ HTML_TEMPLATE = '''<!DOCTYPE html>
     </style>
 </head>
 <body>
-    <main id="content">%(initial)s</main>
-    <script>
-        const pages = %(pages)s;
-        const content = document.getElementById('content');
-
-        function showDocument(name) {
-            content.innerHTML = pages[name] || pages['README.md'];
-            window.scrollTo(0, 0);
-        }
-
-        document.addEventListener('click', function(event) {
-            const link = event.target.closest('a[data-doc]');
-            if (!link) {
-                return;
-            }
-            event.preventDefault();
-            showDocument(link.dataset.doc);
-        });
-
-        showDocument('README.md');
-    </script>
+    <main>%(content)s</main>
 </body>
 </html>
 '''
diff --git a/modules/purchase_trade/view/process_documentation_form.xml b/modules/purchase_trade/view/process_documentation_form.xml
index 456745d..30d1980 100644
--- a/modules/purchase_trade/view/process_documentation_form.xml
+++ b/modules/purchase_trade/view/process_documentation_form.xml
@@ -1,5 +1,5 @@
 <form col="4">
-    <group colspan="4" col="4">
-        <field name="content" widget="html_viewer" height="900" colspan="4"/>
+    <group id="documentation" colspan="4" col="4">
+        <field name="content" widget="html" height="900" colspan="4"/>
     </group>
 </form>
