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 cf25d391669..2d4f81cf602 100644
--- a/htdocs/theme/auguria/style.css.php
+++ b/htdocs/theme/auguria/style.css.php
@@ -2095,7 +2095,7 @@ div.tdlineupdown {
 /* ============================================================================== */
 
 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/bureau2crea/style.css.php b/htdocs/theme/bureau2crea/style.css.php
index acd4ce6afa9..6207ee6161d 100644
--- a/htdocs/theme/bureau2crea/style.css.php
+++ b/htdocs/theme/bureau2crea/style.css.php
@@ -2355,7 +2355,7 @@ 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;
 }
 
 
diff --git a/htdocs/theme/cameleo/style.css.php b/htdocs/theme/cameleo/style.css.php
index 8cc873eefc9..919c2eeabb5 100644
--- a/htdocs/theme/cameleo/style.css.php
+++ b/htdocs/theme/cameleo/style.css.php
@@ -2171,7 +2171,7 @@ 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 e9b14275eab..42aa1b2108b 100644
--- a/htdocs/theme/eldy/style.css.php
+++ b/htdocs/theme/eldy/style.css.php
@@ -2382,7 +2382,7 @@ 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;
 }