- var zug = "POLL sess = "+sess+" stat = "+stat+" subst = "+subst+" step = "+gst.st+" step_loc = "+gst.st_loc+" step_loc_new = "+gst.st_loc_new+" STOP: "+this.stopped;
-
- if (zug != $("sandbox").innerHTML)
- $("sandbox").innerHTML = zug;
-
+ if (this.sandbox != null) {
+ var zug = "POLL sess = "+sess+" stat = "+stat+" subst = "+subst+" step = "+gst.st+" step_loc = "+gst.st_loc+" step_loc_new = "+gst.st_loc_new+" STOP: "+this.stopped;
+
+ if (zug != this.sandbox.innerHTML)
+ this.sandbox.innerHTML = zug;
+ }