Javascript from java

hi
when i tried to call a javascript method with an alert(), im getting the following error....But println() is working fine for me
plz help me
08/01/31 14:21:51 javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: ReferenceError: "alert" is not defined. (<Unknown source>#3) in <Unknown source> at line number 3
08/01/31 14:21:51      at com.sun.script.javascript.RhinoScriptEngine.invoke(RhinoScriptEngine.java:184)
08/01/31 14:21:51      at com.sun.script.javascript.RhinoScriptEngine.invokeFunction(RhinoScriptEngine.java:142)
08/01/31 14:21:51      at testbuiltin.backing.Show_alert.show(Show_alert.java:66)
08/01/31 14:21:51      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
08/01/31 14:21:51      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
08/01/31 14:21:51      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
08/01/31 14:21:51      at java.lang.reflect.Method.invoke(Method.java:597)
08/01/31 14:21:51      at com.sun.el.parser.AstValue.invoke(AstValue.java:151)
08/01/31 14:21:51      at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:51)
08/01/31 14:21:51      at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodBinding(UIXComponentBase.java:1213)
08/01/31 14:21:51      at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:183)
08/01/31 14:21:51      at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:448)
08/01/31 14:21:51      at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
08/01/31 14:21:51      at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._invokeApplication(LifecycleImpl.java:497)
08/01/31 14:21:51      at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:226)
08/01/31 14:21:51      at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:140)
08/01/31 14:21:51      at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
08/01/31 14:21:51      at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
08/01/31 14:21:51      at oracle.adfinternal.view.faces.webapp.rich.SharedLibraryFilter.doFilter(SharedLibraryFilter.java:137)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:285)
08/01/31 14:21:51      at oracle.adfinternal.view.faces.webapp.rich.RegistrationFilter.doFilter(RegistrationFilter.java:60)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:285)
08/01/31 14:21:51      at oracle.adfinternal.view.faces.activedata.ADSFilter.doFilter(ADSFilter.java:76)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl$FilterListChain.doFilter(TrinidadFilterImpl.java:285)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._invokeDoFilter(TrinidadFilterImpl.java:209)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(TrinidadFilterImpl.java:166)
08/01/31 14:21:51      at org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(TrinidadFilterImpl.java:139)
08/01/31 14:21:51      at org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.java:92)
08/01/31 14:21:51      at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:619)
08/01/31 14:21:51      at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:368)
08/01/31 14:21:51      at com.evermind.server.http.HttpRequestHandler.doDispatchRequest(HttpRequestHandler.java:889)
08/01/31 14:21:51      at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:797)
08/01/31 14:21:51      at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:607)

check out apache rhino

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