add executeJavaScriptAndReturnValue function

designer-base/src/main/java/com/fr/design/ui/ModernUIPane.java

@@ -11,7 +11,6 @@ import com.fr.web.struct.AssembleComponent;
 import com.teamdev.jxbrowser.browser.callback.InjectJsCallback;
 import com.teamdev.jxbrowser.chromium.Browser;
 import com.teamdev.jxbrowser.chromium.BrowserType;
-import com.teamdev.jxbrowser.chromium.JSObject;
 import com.teamdev.jxbrowser.chromium.JSValue;
 import com.teamdev.jxbrowser.chromium.events.LoadListener;
 import com.teamdev.jxbrowser.chromium.events.ScriptContextAdapter;
@@ -23,11 +22,11 @@ import com.teamdev.jxbrowser.event.Observer;
 import javax.swing.JDialog;
 import javax.swing.SwingUtilities;
 import javax.swing.WindowConstants;
-import java.util.Map;
 import java.awt.BorderLayout;
 import java.awt.Dimension;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
+import java.util.Map;
 
 /**
  * @author richie
@@ -180,12 +179,10 @@ public class ModernUIPane<T> extends BasicPane {
         }
     }
 
-    public JSObject getEmptyJSObjectV6() {
+    public JSValue executeJavaScriptAndReturnValue(String javaScript) {
-
         if (browser != null) {
-            return browser.executeJavaScriptAndReturnValue("var __empty_props__ = {};__empty_props__").asObject();
+            return browser.executeJavaScriptAndReturnValue(javaScript);
         }
-
         return null;
     }