diff --git a/html/js/scripts.js b/html/js/scripts.js
index ac19a939d..f4b2e5f8d 100644
--- a/html/js/scripts.js
+++ b/html/js/scripts.js
@@ -2687,4 +2687,55 @@ function logout()
     var tmp_last = tmp_b.length - 1
     var place_logout = tmp_place.replace(tmp_b[tmp_last], 'logout.php');
     window.location.href = place_logout;
+}
+/**
+ * Create a div which can be used in a anchor
+ * @returns {undefined}
+ */
+function create_anchor_up()
+{
+    if ( $('up_top')) return;
+    
+    var newElt = new Element('div');
+    newElt.setAttribute('id', 'up_top');
+    newElt.innerHTML='<a id="up_top"></a>';
+    
+    var parent = $('info_div').parentNode;
+    parent.insertBefore(newElt, $('info_div'));
+    
+}
+/**
+ * Initialize the window to show the button "UP" if the window is scrolled
+ * vertically
+ * @returns {undefined}
+ */
+function init_scroll()
+{
+    var up=new Element('div',{"class":"inner_box",
+            "style":"padding:10px;left:auto;width:30px;height: auto;display:none;position:fixed;top:25px;right:20px;text-align:center",
+            id:"go_up"
+        });
+        up.innerHTML=' <a class="button" href="#up_top" >&#11014;</a>';
+        document.body.appendChild(up);
+         window.onscroll=function () {
+         if ( document.viewport.getScrollOffsets().top> 0) {
+             if ($('go_up').visible() == false) {
+                $('go_up').setOpacity(0.85); 
+                $('go_up').show();
+            }
+        } else {
+            $('go_up').hide();
+        }
+     }
+}
+/**
+ * All the onload must be here otherwise the other will overwritten
+ * @returns {undefined}
+ */
+window.onload=function ()
+{
+    console.log('loading');
+    create_anchor_up();
+    init_scroll();
+    sorttable.init
 }
\ No newline at end of file
diff --git a/html/js/sorttable.js b/html/js/sorttable.js
index c9f384c1f..cfe0ae4fd 100644
--- a/html/js/sorttable.js
+++ b/html/js/sorttable.js
@@ -386,7 +386,8 @@ if (/WebKit/i.test(navigator.userAgent)) { // sniff
 }
 
 /* for other browsers */
-window.onload = sorttable.init;
+// Moved into scripts.js 
+//window.onload = sorttable.init;
 
 // written by Dean Edwards, 2005
 // with input from Tino Zijdel, Matthias Miller, Diego Perini
diff --git a/include/param_pcmn.inc.php b/include/param_pcmn.inc.php
index 742c0a72e..cc6934521 100644
--- a/include/param_pcmn.inc.php
+++ b/include/param_pcmn.inc.php
@@ -129,6 +129,11 @@ for ($i=0; $i <$MaxRow; $i++):
 endfor;
 ?>
 </TABLE>
+    <?php
+    /* it will override the classic onscroll (see scripts.js)
+     * @see scripts.js
+     */
+    ?>
     <div id="go_up" class="inner_box" style="padding:0px;left:auto;width:250px;height: 100px;display:none;position:fixed;top:5px;right:20px">
         <?php echo HtmlInput::title_box(_('Navigation'), 'go_up', "hide");?>
         <div style="margin:3%;padding:3%">