diff --git a/htdocs/user/card.php b/htdocs/user/card.php
index dfd90b4dc0f..124c61dc737 100644
--- a/htdocs/user/card.php
+++ b/htdocs/user/card.php
@@ -893,7 +893,7 @@ if ($action == 'create' || $action == 'adduserldap') {
 		print '<input type="hidden" id="lastname" name="lastname" value="'.dol_escape_htmltag($ldap_lastname).'">';
 		print $ldap_lastname;
 	} else {
-		print '<input class="minwidth100 maxwidth150onsmartphone" type="text" id="lastname" name="lastname" value="'.dol_escape_htmltag(GETPOST('lastname', 'alphanohtml')).'">';
+		print '<input class="minwidth100 maxwidth150onsmartphone createloginauto" type="text" id="lastname" name="lastname" value="'.dol_escape_htmltag(GETPOST('lastname', 'alphanohtml')).'">';
 	}
 	print '</td></tr>';
 
@@ -904,7 +904,7 @@ if ($action == 'create' || $action == 'adduserldap') {
 		print '<input type="hidden" name="firstname" value="'.dol_escape_htmltag($ldap_firstname).'">';
 		print $ldap_firstname;
 	} else {
-		print '<input class="minwidth100 maxwidth150onsmartphone" type="text" name="firstname" value="'.dol_escape_htmltag(GETPOST('firstname', 'alphanohtml')).'">';
+		print '<input id="firstname" class="minwidth100 maxwidth150onsmartphone createloginauto" type="text" name="firstname" value="'.dol_escape_htmltag(GETPOST('firstname', 'alphanohtml')).'">';
 	}
 	print '</td></tr>';
 
@@ -918,10 +918,28 @@ if ($action == 'create' || $action == 'adduserldap') {
 		print '<input type="hidden" name="login" value="'.dol_escape_htmltag($ldap_loginsmb).'">';
 		print $ldap_loginsmb;
 	} else {
-		print '<input class="maxwidth200 maxwidth150onsmartphone" maxsize="24" type="text" name="login" value="'.dol_escape_htmltag(GETPOST('login', 'alphanohtml')).'">';
+		print '<input id="login" class="maxwidth200 maxwidth150onsmartphone" maxsize="24" type="text" name="login" value="'.dol_escape_htmltag(GETPOST('login', 'alphanohtml')).'">';
 	}
 	print '</td></tr>';
 
+	if (!empty($conf->use_javascript_ajax)) {
+		print '<script>
+			jQuery(document).ready(function() {
+				$(".createloginauto").on("change", function(){
+					lastname = $("#lastname").val();
+					firstname = $("#firstname").val();
+					if($(this).attr("id") == "firstname"){
+						firstname = firstname.toLowerCase();
+						firstname = firstname[0];
+					}
+					lastname = lastname.toLowerCase();
+					console.log("We create a login from firstname and lastname");
+					$("#login").val(firstname+lastname);
+				})
+			});
+		</script>';
+	}
+
 	$generated_password = '';
 	if (empty($ldap_sid)) {    // ldap_sid is for activedirectory
 		$generated_password = getRandomPassword(false);