diff --git a/mercurial/templates/paper/changeset.tmpl b/mercurial/templates/paper/changeset.tmpl
--- a/mercurial/templates/paper/changeset.tmpl
+++ b/mercurial/templates/paper/changeset.tmpl
@@ -73,9 +73,9 @@
   <th class="diffstat">diffstat</th>
   <td class="diffstat">
     {diffsummary}
-    <a id="diffstatexpand" class="diffstattoggle">[<tt>+</tt>]</a>
+    <a id="diffstatexpand" class="diffstattoggle" href="#">[<tt>+</tt>]</a>
     <div id="diffstatdetails" style="display:none;">
-      <a class="diffstattoggle">[<tt>-</tt>]</a>
+      <a class="diffstattoggle" href="#">[<tt>-</tt>]</a>
       <table class="diffstat-table stripes2">{diffstat}</table>
     </div>
   </td>
@@ -83,7 +83,7 @@
 </table>
 
 <div class="overflow">
-<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
 <div class="sourcefirst"> line diff</div>
 <div class="stripes2 diffblocks">
 {diff}
diff --git a/mercurial/templates/paper/filediff.tmpl b/mercurial/templates/paper/filediff.tmpl
--- a/mercurial/templates/paper/filediff.tmpl
+++ b/mercurial/templates/paper/filediff.tmpl
@@ -65,7 +65,7 @@
 </table>
 
 <div class="overflow">
-<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
 <div class="sourcefirst"> line diff</div>
 <div class="stripes2 diffblocks">
 {diff}
diff --git a/mercurial/templates/paper/filerevision.tmpl b/mercurial/templates/paper/filerevision.tmpl
--- a/mercurial/templates/paper/filerevision.tmpl
+++ b/mercurial/templates/paper/filerevision.tmpl
@@ -65,7 +65,7 @@
 </table>
 
 <div class="overflow">
-<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+<div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
 <div class="sourcefirst"> line source</div>
 <pre class="sourcelines stripes4 wrap bottomline"
      data-logurl="{url|urlescape}log/{symrev}/{file|urlescape}"
diff --git a/tests/test-hgweb-commands.t b/tests/test-hgweb-commands.t
--- a/tests/test-hgweb-commands.t
+++ b/tests/test-hgweb-commands.t
@@ -916,9 +916,9 @@
     <td class="diffstat">
        2 files changed, 2 insertions(+), 0 deletions(-)
   
-      <a id="diffstatexpand" class="diffstattoggle">[<tt>+</tt>]</a>
+      <a id="diffstatexpand" class="diffstattoggle" href="#">[<tt>+</tt>]</a>
       <div id="diffstatdetails" style="display:none;">
-        <a class="diffstattoggle">[<tt>-</tt>]</a>
+        <a class="diffstattoggle" href="#">[<tt>-</tt>]</a>
         <table class="diffstat-table stripes2">  <tr>
       <td class="diffstat-file"><a href="#l1.1">da/foo</a></td>
       <td class="diffstat-total" align="right">1</td>
@@ -942,7 +942,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
@@ -1342,7 +1342,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line source</div>
   <pre class="sourcelines stripes4 wrap bottomline"
        data-logurl="/log/1/foo"
@@ -1476,7 +1476,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line source</div>
   <pre class="sourcelines stripes4 wrap bottomline"
        data-logurl="/log/2/foo"
diff --git a/tests/test-hgweb-diffs.t b/tests/test-hgweb-diffs.t
--- a/tests/test-hgweb-diffs.t
+++ b/tests/test-hgweb-diffs.t
@@ -122,9 +122,9 @@
     <td class="diffstat">
        2 files changed, 2 insertions(+), 0 deletions(-)
   
-      <a id="diffstatexpand" class="diffstattoggle">[<tt>+</tt>]</a>
+      <a id="diffstatexpand" class="diffstattoggle" href="#">[<tt>+</tt>]</a>
       <div id="diffstatdetails" style="display:none;">
-        <a class="diffstattoggle">[<tt>-</tt>]</a>
+        <a class="diffstattoggle" href="#">[<tt>-</tt>]</a>
         <table class="diffstat-table stripes2">  <tr>
       <td class="diffstat-file"><a href="#l1.1">a</a></td>
       <td class="diffstat-total" align="right">1</td>
@@ -148,7 +148,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
@@ -289,7 +289,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
@@ -419,9 +419,9 @@
     <td class="diffstat">
        2 files changed, 2 insertions(+), 0 deletions(-)
   
-      <a id="diffstatexpand" class="diffstattoggle">[<tt>+</tt>]</a>
+      <a id="diffstatexpand" class="diffstattoggle" href="#">[<tt>+</tt>]</a>
       <div id="diffstatdetails" style="display:none;">
-        <a class="diffstattoggle">[<tt>-</tt>]</a>
+        <a class="diffstattoggle" href="#">[<tt>-</tt>]</a>
         <table class="diffstat-table stripes2">  <tr>
       <td class="diffstat-file"><a href="#l1.1">a</a></td>
       <td class="diffstat-total" align="right">1</td>
@@ -445,7 +445,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
@@ -590,7 +590,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
diff --git a/tests/test-hgweb-removed.t b/tests/test-hgweb-removed.t
--- a/tests/test-hgweb-removed.t
+++ b/tests/test-hgweb-removed.t
@@ -103,9 +103,9 @@
     <td class="diffstat">
        1 files changed, 0 insertions(+), 1 deletions(-)
   
-      <a id="diffstatexpand" class="diffstattoggle">[<tt>+</tt>]</a>
+      <a id="diffstatexpand" class="diffstattoggle" href="#">[<tt>+</tt>]</a>
       <div id="diffstatdetails" style="display:none;">
-        <a class="diffstattoggle">[<tt>-</tt>]</a>
+        <a class="diffstattoggle" href="#">[<tt>-</tt>]</a>
         <table class="diffstat-table stripes2">  <tr>
       <td class="diffstat-file"><a href="#l1.1">a</a></td>
       <td class="diffstat-total" align="right">1</td>
@@ -121,7 +121,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
@@ -225,7 +225,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line diff</div>
   <div class="stripes2 diffblocks">
   <div class="bottomline inc-lineno"><pre class="sourcelines wrap">
diff --git a/tests/test-highlight.t b/tests/test-highlight.t
--- a/tests/test-highlight.t
+++ b/tests/test-highlight.t
@@ -146,7 +146,7 @@
   </table>
   
   <div class="overflow">
-  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink">on</a></div>
+  <div class="sourcefirst linewraptoggle">line wrap: <a class="linewraplink" href="#">on</a></div>
   <div class="sourcefirst"> line source</div>
   <pre class="sourcelines stripes4 wrap bottomline"
        data-logurl="/log/tip/primes.py"