fixed bugs in the Find script and also rigged ScriptManager to better handle

the JavaScript native errors that crop up occasionally

src/com/silverwrist/venice/ui/script/ScriptManager.java

@@ -222,6 +222,21 @@ public class ScriptManager
 
   } // end fixupRhino
 
+  private static void translateReturnedObject(ScriptReturn sro) throws ScriptingException
+  {
+    Object obj = sro.get();
+    if (obj==null)
+      return;  // nothing to do
+
+    Class klass = obj.getClass();
+    final String klassname = klass.getName();
+
+    // Special processing for JavaScript NativeError objects
+    if (klassname.equals("org.mozilla.javascript.NativeError"))
+      throw new ScriptingException("JavaScript runtime error: " + obj.toString());
+
+  } // end translateReturnedObject
+
   private void translateScriptException(String source, String lang, BSFException e)
       throws ScriptingException, ThrowableContent
   {
@@ -338,6 +353,10 @@ public class ScriptManager
 
     } // end finally
 
+    // if we've gotten this far, see if the returned object is actually an error that needs
+    // translation before it can be presented to the world
+    translateReturnedObject(sro);
+
   } // end exec
 
   public void register(String name, Object obj)