diff --git a/htdocs/projet/ganttview.php b/htdocs/projet/ganttview.php
index 1747d8b9356..02d2d678215 100644
--- a/htdocs/projet/ganttview.php
+++ b/htdocs/projet/ganttview.php
@@ -228,7 +228,8 @@ if (count($tasksarray)>0)
 
 	if (! empty($conf->use_javascript_ajax))
 	{
-		print '<div id="tabs" style="border: 1px solid #ACACAC;">'."\n";
+	    //var_dump($_SESSION);
+		print '<div id="tabs" class="ganttcontainer" style="border: 1px solid #ACACAC;">'."\n";
 		include_once(DOL_DOCUMENT_ROOT.'/projet/ganttchart.php');
 		print '</div>'."\n";
 	}
diff --git a/htdocs/theme/auguria/style.css.php b/htdocs/theme/auguria/style.css.php
index 47df134444f..145bd986fd7 100644
--- a/htdocs/theme/auguria/style.css.php
+++ b/htdocs/theme/auguria/style.css.php
@@ -2061,7 +2061,7 @@ div.tdlineupdown {
 /* ============================================================================== */
 
 div.scroll2 {
-	width: 582px !important;
+	width: <?php print isset($_SESSION['dol_screenwidth'])?max($_SESSION['dol_screenwidth']-830,450):'450'; ?>px !important;
 }
 
 
@@ -2187,4 +2187,4 @@ div.ecmjqft {
 
 <?php
 if (is_object($db)) $db->close();
-?>
\ No newline at end of file
+?>
diff --git a/htdocs/theme/bureau2crea/style.css.php b/htdocs/theme/bureau2crea/style.css.php
index f400ef43d72..365367f33b1 100644
--- a/htdocs/theme/bureau2crea/style.css.php
+++ b/htdocs/theme/bureau2crea/style.css.php
@@ -2315,7 +2315,7 @@ form.listactionsfilter input[type="submit"] {
 /* ============================================================================== */
 
 div.scroll2 {
-	width: 582px !important;
+	width: <?php print isset($_SESSION['dol_screenwidth'])?max($_SESSION['dol_screenwidth']-830,450):'450'; ?>px !important;
 }
 
 
@@ -2432,4 +2432,4 @@ div.ecmjqft {
 
 <?php
 if (is_object($db)) $db->close();
-?>
\ No newline at end of file
+?>
diff --git a/htdocs/theme/cameleo/style.css.php b/htdocs/theme/cameleo/style.css.php
index ac5932e80fb..4e09c1c61c0 100644
--- a/htdocs/theme/cameleo/style.css.php
+++ b/htdocs/theme/cameleo/style.css.php
@@ -2131,7 +2131,7 @@ div.table-val-border-col {
 /* ============================================================================== */
 
 div.scroll2 {
-	width: 582px !important;
+	width: <?php print isset($_SESSION['dol_screenwidth'])?max($_SESSION['dol_screenwidth']-830,450):'450'; ?>px !important;
 }
 
 
diff --git a/htdocs/theme/eldy/style.css.php b/htdocs/theme/eldy/style.css.php
index 57ccf7c6e53..b7df82725d2 100644
--- a/htdocs/theme/eldy/style.css.php
+++ b/htdocs/theme/eldy/style.css.php
@@ -2282,7 +2282,7 @@ a.cke_dialog_ui_button
 /* ============================================================================== */
 
 div.scroll2 {
-	width: 582px !important;
+	width: <?php print isset($_SESSION['dol_screenwidth'])?max($_SESSION['dol_screenwidth']-830,450):'450'; ?>px !important;
 }