diff --git a/htdocs/core/js/lib_head.js.php b/htdocs/core/js/lib_head.js.php
index db86d5e8b58..cf8557de961 100644
--- a/htdocs/core/js/lib_head.js.php
+++ b/htdocs/core/js/lib_head.js.php
@@ -841,10 +841,11 @@ function copyToClipboard(text,text2)
  * @return	boolean			False
  * @see document_preview
  */
-function newpopup(url,title) {
+function newpopup(url, title) {
 	var argv = newpopup.arguments;
 	var argc = newpopup.arguments.length;
 	tmp=url;
+	console.log("newpopup "+argv[2]+" "+argv[3]);
 	var l = (argc > 2) ? argv[2] : 600;
 	var h = (argc > 3) ? argv[3] : 400;
 	var left = (screen.width - l)/2;
diff --git a/htdocs/societe/card.php b/htdocs/societe/card.php
index be9ff83cb45..9c688c19c99 100644
--- a/htdocs/societe/card.php
+++ b/htdocs/societe/card.php
@@ -1368,12 +1368,12 @@ else
             if (! empty($conf->use_javascript_ajax))
             {
             	$widthpopup = 600;
-            	if ( empty($conf->dol_use_jmobile)) $widthpopup = 350;
+            	if (! empty($conf->dol_use_jmobile)) $widthpopup = 350;
             	$heightpopup = 400;
                 print "\n";
                 print '<script language="JavaScript" type="text/javascript">';
                 print "function CheckVAT(a) {\n";
-                print "newpopup('".DOL_URL_ROOT."/societe/checkvat/checkVatPopup.php?vatNumber='+a,'".dol_escape_js($langs->trans("VATIntraCheckableOnEUSite"))."', '.$widthpopup.', '.$heightpopup.');\n";
+                print "newpopup('".DOL_URL_ROOT."/societe/checkvat/checkVatPopup.php?vatNumber='+a, '".dol_escape_js($langs->trans("VATIntraCheckableOnEUSite"))."', ".$widthpopup.", ".$heightpopup.");\n";
                 print "}\n";
                 print '</script>';
                 print "\n";
@@ -2031,10 +2031,13 @@ else
 
                 if ($conf->use_javascript_ajax)
                 {
-                    print "\n";
+                	$widthpopup = 600;
+                	if (! empty($conf->dol_use_jmobile)) $widthpopup = 350;
+                	$heightpopup = 400;
+                	print "\n";
                     print '<script language="JavaScript" type="text/javascript">';
                     print "function CheckVAT(a) {\n";
-                    print "newpopup('".DOL_URL_ROOT."/societe/checkvat/checkVatPopup.php?vatNumber='+a,'".dol_escape_js($langs->trans("VATIntraCheckableOnEUSite"))."',500,285);\n";
+                    print "newpopup('".DOL_URL_ROOT."/societe/checkvat/checkVatPopup.php?vatNumber='+a,'".dol_escape_js($langs->trans("VATIntraCheckableOnEUSite"))."', ".$widthpopup.", ".$heightpopup.");\n";
                     print "}\n";
                     print '</script>';
                     print "\n";
@@ -2440,10 +2443,13 @@ else
 
                 if ($conf->use_javascript_ajax)
                 {
+                	$widthpopup = 600;
+                	if (! empty($conf->dol_use_jmobile)) $widthpopup = 350;
+                	$heightpopup = 400;
                     print "\n";
                     print '<script language="JavaScript" type="text/javascript">';
                     print "function CheckVAT(a) {\n";
-                    print "newpopup('".DOL_URL_ROOT."/societe/checkvat/checkVatPopup.php?vatNumber='+a,'".dol_escape_js($langs->trans("VATIntraCheckableOnEUSite"))."',500,285);\n";
+                    print "newpopup('".DOL_URL_ROOT."/societe/checkvat/checkVatPopup.php?vatNumber='+a, '".dol_escape_js($langs->trans("VATIntraCheckableOnEUSite"))."', ".$widthpopup.", ".$heightpopup.");\n";
                     print "}\n";
                     print '</script>';
                     print "\n";