Index: /issm/trunk-jpl/src/m/plot/plot_transient_movie.js
===================================================================
--- /issm/trunk-jpl/src/m/plot/plot_transient_movie.js	(revision 23001)
+++ /issm/trunk-jpl/src/m/plot/plot_transient_movie.js	(revision 23002)
@@ -84,8 +84,8 @@
 				vesl.graph.draw(canvas);
 			}
-			if (canvas.playbackSlider) {
+			if (!vesl.helpers.isEmptyOrUndefined(canvas.playbackSlider)) {
 				canvas.playbackSlider.val(frame);
 			}
-			if (canvas.playbackTextProgress) {
+			if (!vesl.helpers.isEmptyOrUndefined(canvas.playbackProgressText)) {
 				canvas.playbackProgressText.html(steps[frame].toFixed(0) + " " + options.getfieldvalue("movietimeunit","yr"));
 			}
@@ -101,5 +101,5 @@
 	
 	//Update progress bar with new frame info.
-	if (canvas.playbackSlider) {
+	if (!vesl.helpers.isEmptyOrUndefined(canvas.playbackSlider)) {
 		canvas.playbackSlider.val(canvas.animation.frame);
 		canvas.playbackSlider.setUpperBound(steps.length - 1);