diff --git a/ganttzk/src/main/resources/web/js/ganttz/TimeTracker.js b/ganttzk/src/main/resources/web/js/ganttz/TimeTracker.js
index e5e81a195..748047d57 100644
--- a/ganttzk/src/main/resources/web/js/ganttz/TimeTracker.js
+++ b/ganttzk/src/main/resources/web/js/ganttz/TimeTracker.js
@@ -1,3 +1,15 @@
 zk.$package("ganttz");
 
-ganttz.TimeTracker = zk.$extends(zk.Macro,{})
\ No newline at end of file
+ganttz.TimeTracker = zk.$extends(zk.Macro,{
+	$init : function(){
+    this.$supers('$init', arguments);
+    	this.$class.setInstance(this);
+	}
+},{
+    getInstance : function(){
+    	return this._instance;
+	},
+	setInstance : function(instance){
+		this._instance = instance;
+	}
+})
\ No newline at end of file