diff --git a/htdocs/core/menus/standard/eldy.lib.php b/htdocs/core/menus/standard/eldy.lib.php
index c564856854d..0088de9955c 100644
--- a/htdocs/core/menus/standard/eldy.lib.php
+++ b/htdocs/core/menus/standard/eldy.lib.php
@@ -30,7 +30,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/class/menubase.class.php';
  * Core function to output top menu eldy
  *
  * @param 	DoliDB	$db				Database handler
- * @param 	string	$atarget		Target
+ * @param 	string	$atarget		Target (Example: '' or '_top')
  * @param 	int		$type_user     	0=Menu for backoffice, 1=Menu for front office
  * @param  	array	&$tabMenu       If array with menu entries already loaded, we put this array here (in most cases, it's empty)
  * @param	array	&$menu			Object Menu to return back list of menu entries
@@ -443,7 +443,7 @@ function print_left_eldy_menu($db,$menu_array_before,$menu_array_after,&$tabMenu
 	$leftmenu=($forceleftmenu?'':(empty($_SESSION["leftmenu"])?'none':$_SESSION["leftmenu"]));
 
 	// Show logo company
-	if (empty($noout) && ! empty($conf->global->MAIN_SHOW_LOGO))
+	if (empty($conf->global->MAIN_MENU_INVERT) && empty($noout) && ! empty($conf->global->MAIN_SHOW_LOGO))
 	{
 		$mysoc->logo_mini=$conf->global->MAIN_INFO_SOCIETE_LOGO_MINI;
 		if (! empty($mysoc->logo_mini) && is_readable($conf->mycompany->dir_output.'/logos/thumbs/'.$mysoc->logo_mini))
@@ -1253,6 +1253,7 @@ function print_left_eldy_menu($db,$menu_array_before,$menu_array_after,&$tabMenu
 	if (! is_array($menu_array)) return 0;
 
 	// Show menu
+	$invert=empty($conf->global->MAIN_MENU_INVERT)?"":"invert";
 	if (empty($noout))
 	{
 		$alt=0; $blockvmenuopened=false;
@@ -1268,11 +1269,11 @@ function print_left_eldy_menu($db,$menu_array_before,$menu_array_after,&$tabMenu
 				$blockvmenuopened=true;
 				if (($alt%2==0))
 				{
-					print '<div class="blockvmenuimpair">'."\n";
+					print '<div class="blockvmenuimpair'.$invert.'">'."\n";
 				}
 				else
 				{
-					print '<div class="blockvmenupair">'."\n";
+					print '<div class="blockvmenupair'.$invert.'">'."\n";
 				}
 			}
 
diff --git a/htdocs/core/menus/standard/eldy_menu.php b/htdocs/core/menus/standard/eldy_menu.php
index 62f82b3fb05..3c690a37719 100644
--- a/htdocs/core/menus/standard/eldy_menu.php
+++ b/htdocs/core/menus/standard/eldy_menu.php
@@ -131,8 +131,18 @@ class MenuManager
 		require_once DOL_DOCUMENT_ROOT.'/core/class/menu.class.php';
         $this->menu=new Menu();
 
-        if ($mode == 'top')  $res=print_eldy_menu($this->db,$this->atarget,$this->type_user,$this->tabMenu,$this->menu,0);
-        if ($mode == 'left') $res=print_left_eldy_menu($this->db,$this->menu_array,$this->menu_array_after,$this->tabMenu,$this->menu,0);
+        if (empty($conf->global->MAIN_MENU_INVERT))
+        {
+        	if ($mode == 'top')  $res=print_eldy_menu($this->db,$this->atarget,$this->type_user,$this->tabMenu,$this->menu,0);
+        	if ($mode == 'left') $res=print_left_eldy_menu($this->db,$this->menu_array,$this->menu_array_after,$this->tabMenu,$this->menu,0);
+        }
+        else
+		{
+        	$conf->global->MAIN_SHOW_LOGO=0;
+        	if ($mode == 'top')  $res=print_left_eldy_menu($this->db,$this->menu_array,$this->menu_array_after,$this->tabMenu,$this->menu,0);
+        	if ($mode == 'left') $res=print_eldy_menu($this->db,$this->atarget,$this->type_user,$this->tabMenu,$this->menu,0);
+		}
+
         if ($mode == 'jmobile')
         {
         	$res=print_eldy_menu($this->db,$this->atarget,$this->type_user,$this->tabMenu,$this->menu,1);
@@ -167,7 +177,7 @@ class MenuManager
         				// We add sub entry
         				print str_pad('',1).'<li data-role="list-dividerxxx" class="lilevel1 ui-btn-icon-right ui-btn">';	 // ui-btn to highlight on clic
         				print '<a href="'.$relurl.'"';
-        				//print ' data-ajax="false"'; 
+        				//print ' data-ajax="false"';
         				print '>';
         				print str_pad('',12,'&nbsp;');
         				if ($langs->trans(ucfirst($val['mainmenu'])."Dashboard") == ucfirst($val['mainmenu'])."Dashboard") print $langs->trans("Access");	// No translation
@@ -185,10 +195,10 @@ class MenuManager
         				if (in_array($canonurl2,array('/admin/index.php','/admin/tools/index.php','/core/tools.php'))) $relurl2='';
         				if ($val2['level']==0) print str_pad('',$val2['level']+1).'<li'.($val2['level']==0?' data-role="list-dividerxxx"':'').' class="lilevel'.($val2['level']+1).' ui-btn-icon-right ui-btn">';	 // ui-btn to highlight on clic
         				else print str_pad('',$val2['level']+1).'<li class="lilevel'.($val2['level']+1).'">';	 // ui-btn to highlight on clic
-        				if ($relurl2) 
+        				if ($relurl2)
         				{
         					print '<a href="'.$relurl2.'"';
-        					//print ' data-ajax="false"'; 
+        					//print ' data-ajax="false"';
         					print '>';
         				}
 						print str_pad('',($val2['level']+1)*12,'&nbsp;');
diff --git a/htdocs/externalsite/frames.php b/htdocs/externalsite/frames.php
index 825398f3636..bbd9a188dc3 100644
--- a/htdocs/externalsite/frames.php
+++ b/htdocs/externalsite/frames.php
@@ -46,7 +46,7 @@ print "
 <title>Dolibarr frame for external web site</title>
 </head>
 
-<frameset rows=\"".$heightforframes.",*\" border=0 framespacing=0 frameborder=0>
+<frameset ".(empty($conf->global->MAIN_MENU_INVERT)?"rows":"cols")."=\"".$heightforframes.",*\" border=0 framespacing=0 frameborder=0>
     <frame name=\"barre\" src=\"frametop.php?mainmenu=".$mainmenu."&leftmenu=".$leftmenu."&idmenu=".$idmenu.($theme?'&theme='.$theme:'').($codelang?'&lang='.$codelang:'')."&nobackground=1\" noresize scrolling=\"NO\" noborder>
     <frame name=\"main\" src=\"".$conf->global->EXTERNALSITE_URL."\">
     <noframes>
diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index 68f341e612b..8848219f809 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -1273,7 +1273,7 @@ function top_htmlhead($head, $title='', $disablejs=0, $disablehead=0, $arrayofjs
  *
  *  @param      string	$head    			Lines in the HEAD
  *  @param      string	$title   			Title of web page
- *  @param      string	$target  			Target to use in menu links
+ *  @param      string	$target  			Target to use in menu links (Example: '' or '_top')
  *	@param		int		$disablejs			Do not output links to js (Ex: qd fonction utilisee par sous formulaire Ajax)
  *	@param		int		$disablehead		Do not output head section
  *	@param		array	$arrayofjs			Array of js files to add in header
@@ -1373,7 +1373,7 @@ function top_menu($head, $title='', $target='', $disablejs=0, $disablehead=0, $a
     if (empty($conf->dol_hide_topmenu))
     {
 	    // Show menu entries
-    	print '<div id="tmenu_tooltip" class="tmenu">'."\n";
+    	print '<div id="tmenu_tooltip'.(empty($conf->global->MAIN_MENU_INVERT)?'':'invert').'" class="tmenu">'."\n";
 	    $menumanager->atarget=$target;
 	    $menumanager->showmenu('top');      // This contains a \n
 	    print "</div>\n";
diff --git a/htdocs/theme/eldy/style.css.php b/htdocs/theme/eldy/style.css.php
index b58030ac654..25ffaebc3bf 100644
--- a/htdocs/theme/eldy/style.css.php
+++ b/htdocs/theme/eldy/style.css.php
@@ -601,8 +601,10 @@ li.tmenu, li.tmenusel {
 	<?php print $minwidthtmenu?'min-width: '.$minwidthtmenu.'px;':''; ?>
 	text-align: center;
 	vertical-align: bottom;
+	<?php if (empty($conf->global->MAIN_MENU_INVERT)) { ?>
 	float: <?php print $left; ?>;
     height: <?php print $heightmenu; ?>px;
+    <?php } ?>
 	position:relative;
 	display: block;
 	padding: 0px 0px 2px 0px;