diff --git a/src/root/layout.tt b/src/root/layout.tt
index 8768ad40..2337599b 100644
--- a/src/root/layout.tt
+++ b/src/root/layout.tt
@@ -33,78 +33,7 @@
     <link rel="stylesheet" href="/static/css/tree.css" type="text/css" />
     <link rel="stylesheet" href="/static/css/logfile.css" type="text/css" />
 
-    <script type="text/javascript">
-      $(document).ready(function() {
-
-          /*** Tree toggles in logfiles. ***/
-
-          /* Set the appearance of the toggle depending on whether the
-             corresponding subtree is initially shown or hidden. */
-          $(".tree-toggle").map(function() {
-              if ($(this).siblings("ul:hidden").length == 0) {
-                  $(this).text("-");
-              } else {
-                  $(this).text("+");
-              }
-          });
-
-          /* When a toggle is clicked, show or hide the subtree. */
-          $(".tree-toggle").click(function() {
-              if ($(this).siblings("ul:hidden").length != 0) {
-                  $(this).siblings("ul").show();
-                  $(this).text("-");
-              } else {
-                  $(this).siblings("ul").hide();
-                  $(this).text("+");
-              }
-          });
-
-          /* Implementation of the expand all link. */
-          $(".tree-expand-all").click(function() {
-              $(".tree-toggle", $(this).parent().siblings(".tree")).map(function() {
-                  $(this).siblings("ul").show();
-                  $(this).text("-");
-              });
-          });
-
-          /* Implementation of the collapse all link. */
-          $(".tree-collapse-all").click(function() {
-              $(".tree-toggle", $(this).parent().siblings(".tree")).map(function() {
-                  $(this).siblings("ul").hide();
-                  $(this).text("+");
-              });
-          });
-
-          $("table.clickable-rows").click(function(event) {
-              if ($(event.target).closest("a").length) return;
-              link = $(event.target).parents("tr").find("a.row-link");
-              if (link.length == 1)
-                window.location = link.attr("href");
-          });
-
-          bootbox.animate(false);
-
-          $(".hydra-popover").popover({});
-
-          /* Ensure that pressing the back button on another page
-             navigates back to the previously selected tab on this
-             page. */
-          $(function() {
-              $('.nav-tabs').bind('show', function(e) {
-                  var pattern = /#.+/gi;
-                  var id = e.target.toString().match(pattern)[0];
-                  history.replaceState(null, "", id);
-              });
-          });
-
-          $(function() {
-              if (window.location.hash) {
-                  $(".nav a[href='" + window.location.hash + "']").tab('show');
-              }
-          })
-      });
-
-    </script>
+    <script type="text/javascript" src="/static/js/common.js"></script>
 
     [% tracker %]
 
diff --git a/src/root/static/js/common.js b/src/root/static/js/common.js
new file mode 100644
index 00000000..44f52462
--- /dev/null
+++ b/src/root/static/js/common.js
@@ -0,0 +1,67 @@
+$(document).ready(function() {
+
+    /*** Tree toggles in logfiles. ***/
+
+    /* Set the appearance of the toggle depending on whether the
+       corresponding subtree is initially shown or hidden. */
+    $(".tree-toggle").map(function() {
+        if ($(this).siblings("ul:hidden").length == 0) {
+            $(this).text("-");
+        } else {
+            $(this).text("+");
+        }
+    });
+
+    /* When a toggle is clicked, show or hide the subtree. */
+    $(".tree-toggle").click(function() {
+        if ($(this).siblings("ul:hidden").length != 0) {
+            $(this).siblings("ul").show();
+            $(this).text("-");
+        } else {
+            $(this).siblings("ul").hide();
+            $(this).text("+");
+        }
+    });
+
+    /* Implementation of the expand all link. */
+    $(".tree-expand-all").click(function() {
+        $(".tree-toggle", $(this).parent().siblings(".tree")).map(function() {
+            $(this).siblings("ul").show();
+            $(this).text("-");
+        });
+    });
+
+    /* Implementation of the collapse all link. */
+    $(".tree-collapse-all").click(function() {
+        $(".tree-toggle", $(this).parent().siblings(".tree")).map(function() {
+            $(this).siblings("ul").hide();
+            $(this).text("+");
+        });
+    });
+
+    $("table.clickable-rows").click(function(event) {
+        if ($(event.target).closest("a").length) return;
+        link = $(event.target).parents("tr").find("a.row-link");
+        if (link.length == 1)
+          window.location = link.attr("href");
+    });
+
+    bootbox.animate(false);
+
+    $(".hydra-popover").popover({});
+
+    /* Ensure that pressing the back button on another page
+       navigates back to the previously selected tab on this
+       page. */
+    $('.nav-tabs').bind('show', function(e) {
+        var pattern = /#.+/gi;
+        var id = e.target.toString().match(pattern)[0];
+        history.replaceState(null, "", id);
+    });
+
+    $(function() {
+        if (window.location.hash) {
+            $(".nav a[href='" + window.location.hash + "']").tab('show');
+        }
+    })
+});