diff -r 9771a724af09 -r 705e34c6fe93 svghmi/widget_button.ysl2
--- a/svghmi/widget_button.ysl2	Mon Aug 03 18:25:23 2020 +0200
+++ b/svghmi/widget_button.ysl2	Tue Aug 04 11:53:39 2020 +0200
@@ -9,14 +9,14 @@
     |         this.active_elt.setAttribute("style", this.active_style);
     |         this.inactive_elt.setAttribute("style", "display:none");
     |     }
-    |     apply_hmi_value(this.get_idx(0), 1);
+    |     this.apply_hmi_value(0, 1);
     | },
     | on_mouse_up: function(evt) {
     |     if (this.active_style && this.inactive_style) {
     |         this.active_elt.setAttribute("style", "display:none");
     |         this.inactive_elt.setAttribute("style", this.inactive_style);
     |     }
-    |     apply_hmi_value(this.get_idx(0), 0);
+    |     this.apply_hmi_value(0, 0);
     | },
     | active_style: undefined,
     | inactive_style: undefined,