Index: /issm/trunk-jpl/src/m/plot/plot_unit.js
===================================================================
--- /issm/trunk-jpl/src/m/plot/plot_unit.js	(revision 20795)
+++ /issm/trunk-jpl/src/m/plot/plot_unit.js	(revision 20796)
@@ -245,19 +245,17 @@
 				if (canvas["movieHandler"])	clearInterval(canvas["movieHandler"]);
 				canvas["movieHandler"] = setInterval(function () {
+						node["movieFrame"] = canvas["movieFrame"];
 						if (canvas["moviePlay"]) {
-							node["movieFrame"] = canvas["movieFrame"];
-							if (canvas["movieIncrement"]) {
-								if (canvas["movieReverse"]) {
-									node["movieFrame"] = (((node["movieFrame"] - 1) % node["movieLength"]) + node["movieLength"]) % node["movieLength"]; //Handle negative modulus
-								}
-								else {
-									node["movieFrame"] = (((node["movieFrame"] + 1) % node["movieLength"]) + node["movieLength"]) % node["movieLength"]; //Handle negative modulus
-								}
+							if (canvas["movieReverse"]) {
+								node["movieFrame"] = (((node["movieFrame"] - 1) % node["movieLength"]) + node["movieLength"]) % node["movieLength"]; //Handle negative modulus
 							}
-							if (canvas["timeLabel"]) canvas["timeLabel"].html(node["movieTimestamps"][node["movieFrame"]].toFixed(0) + " " + options.getfieldvalue("movietimeunit","yr"));
-							if (canvas["progressBar"]) canvas["progressBar"].slider("value", node["movieFrame"]);
-							node["buffers"] = initBuffers(gl,[node["arrays"][0],node["arrays"][1][node["movieFrame"]],node["arrays"][2]]);
-							canvas["movieFrame"] = node["movieFrame"];
+							else {
+								node["movieFrame"] = (((node["movieFrame"] + 1) % node["movieLength"]) + node["movieLength"]) % node["movieLength"]; //Handle negative modulus
+							}
 						}
+						if (canvas["timeLabel"]) canvas["timeLabel"].html(node["movieTimestamps"][node["movieFrame"]].toFixed(0) + " " + options.getfieldvalue("movietimeunit","yr"));
+						if (canvas["progressBar"]) canvas["progressBar"].slider("value", node["movieFrame"]);
+						node["buffers"] = initBuffers(gl,[node["arrays"][0],node["arrays"][1][node["movieFrame"]],node["arrays"][2]]);
+						canvas["movieFrame"] = node["movieFrame"];
 					}, node["movieInterval"]);
 				if (canvas["progressBar"]) {