E4X

Hi everybody. I have a problem in ESB for Filter the next XML using E4X in JS Mediator.

      <datas1:TipoCambioResp xmlns:datas1="http://ws.wso2.org/dataservice">
         <datas1:TipoCambio>
            <datas1:Moneda>UDI</datas1:Moneda>
            <datas1:Fecha>2010-01-28 00:00:00.0</datas1:Fecha>
            <datas1:Valor>4.336054</datas1:Valor>
         </datas1:TipoCambio>
         <datas1:TipoCambio>
            <datas1:Moneda>SMDF</datas1:Moneda>
            <datas1:Fecha>2010-01-21 00:00:00.0</datas1:Fecha>
            <datas1:Valor>1644.000000</datas1:Valor>
         </datas1:TipoCambio>
      </datas1:TipoCambioResp>


I'm trying to get the node Moneda = "UDI".

With this instructions:
*************
var Payload = mc.getPayloadXML();
Payload.*::TipoCambio.(*::Moneda == "UDI")
*************

But I get the next error:
[2010-01-29 18:28:06,880] ERROR - ScriptMediator The script engine returned an error executing the external js script : jsFondeoSEPSTC function InicializaVariables
com.sun.phobos.script.util.ExtendedScriptException: org.mozilla.javascript.EvaluatorException: syntax error (<Unknown source>#44)in: <Unknown source>at line no: 44
        at com.sun.phobos.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:184)
        at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:62)
        at org.apache.synapse.mediators.bsf.ScriptMediator.prepareExternalScript(ScriptMediator.java:321)
        at org.apache.synapse.mediators.bsf.ScriptMediator.mediateWithExternalScript(ScriptMediator.java:231)
        at org.apache.synapse.mediators.bsf.ScriptMediator.invokeScript(ScriptMediator.java:198)