diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java b/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java
index 0867e458c..7f4c66774 100644
--- a/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/Planner.java
@@ -17,6 +17,7 @@ import org.zkoss.ganttz.extensions.ITab;
 import org.zkoss.ganttz.extensions.ITabFactory;
 import org.zkoss.ganttz.util.IMenuItemsRegister;
 import org.zkoss.ganttz.util.OnZKDesktopRegistry;
+import org.zkoss.ganttz.util.script.IScriptsRegister;
 import org.zkoss.zk.ui.Executions;
 import org.zkoss.zul.impl.XulElement;
 
@@ -39,6 +40,12 @@ public class Planner extends XulElement {
     private FunctionalityExposedForExtensions<?> context;
 
     public Planner() {
+        registerNeededScripts();
+    }
+
+    private void registerNeededScripts() {
+        IScriptsRegister register = getScriptsRegister();
+        register.register(ScriptsRequiredByPlanner.class);
     }
 
     TaskList getTaskList() {
@@ -214,4 +221,9 @@ public class Planner extends XulElement {
         taskList.adjustZoomColumnsHeight();
         getDependencyList().redrawDependencies();
     }
+
+    private IScriptsRegister getScriptsRegister() {
+        return OnZKDesktopRegistry.getLocatorFor(IScriptsRegister.class)
+                .retrieve();
+    }
 }
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/ScriptsRequiredByPlanner.java b/ganttzk/src/main/java/org/zkoss/ganttz/ScriptsRequiredByPlanner.java
new file mode 100644
index 000000000..4033ab46e
--- /dev/null
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/ScriptsRequiredByPlanner.java
@@ -0,0 +1,15 @@
+package org.zkoss.ganttz;
+
+import org.zkoss.ganttz.util.script.ScriptsRequiredDeclaration;
+
+@ScriptsRequiredDeclaration(dependsOn = YUIMin.class)
+public class ScriptsRequiredByPlanner {
+
+    public static final String SELECTOR = "/zkau/web/js/yui/2.7.0/selector/selector-min.js";
+    public static final String YAHOO_DOM_EVENT = "zkau/web/js/yui/2.7.0/yahoo-dom-event/yahoo-dom-event.js";
+    public static final String DRAGDROPMIN = "zkau/web/js/yui/2.7.0/dragdrop/dragdrop-min.js";
+
+    public static final String ELEMENT_MIN = "zkau/web/js/yui/2.7.0/element/element-min.js";
+    public static final String RESIZE_MIN = "zkau/web/js/yui/2.7.0/resize/resize-min.js";
+    public static final String LOGGER_MIN = "zkau/web/js/yui/2.7.0/logger/logger-min.js";
+}
diff --git a/ganttzk/src/main/java/org/zkoss/ganttz/YUIMin.java b/ganttzk/src/main/java/org/zkoss/ganttz/YUIMin.java
new file mode 100644
index 000000000..eb797cdce
--- /dev/null
+++ b/ganttzk/src/main/java/org/zkoss/ganttz/YUIMin.java
@@ -0,0 +1,10 @@
+package org.zkoss.ganttz;
+
+import org.zkoss.ganttz.util.script.ScriptsRequiredDeclaration;
+
+@ScriptsRequiredDeclaration
+public class YUIMin {
+
+    public static final String YUI_MIN = "/zkau/web/js/yui/2.7.0/yahoo/yahoo-min.js";
+
+}
diff --git a/ganttzk/src/main/resources/web/ganttz/planner.dsp b/ganttzk/src/main/resources/web/ganttz/planner.dsp
index 35e02704a..3c1943805 100644
--- a/ganttzk/src/main/resources/web/ganttz/planner.dsp
+++ b/ganttzk/src/main/resources/web/ganttz/planner.dsp
@@ -5,17 +5,8 @@
 
 <link rel="stylesheet" type="text/css" href="${self.contextPath}/zkau/web/js/yui/2.7.0/resize/assets/skins/sam/resize.css">
 
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/yahoo/yahoo-min.js'></script>
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/selector/selector-min.js'></script>
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/yahoo-dom-event/yahoo-dom-event.js'></script>
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/dragdrop/dragdrop-min.js'></script>
-
 <c:include page="~./ganttz/css/task.css.dsp"/>
 
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/element/element-min.js'></script>
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/resize/resize-min.js'></script>
-<script type='text/javascript' src='${self.contextPath}/zkau/web/js/yui/2.7.0/logger/logger-min.js'></script>
-
 <script type="text/javascript">
 /*<![CDATA[ */
     webapp_context_path = '${self.contextPath}';