Hi,everyone:
   I have read some reference saying that it's ok to invoke component method with parameters in jseam EL.  But i cannot figure out how to do that.
  
   code in page:

<h:commandLink action="#{viewServiceOfPro.test(}" style="text-decoration:none;">
     <h:outputText value="Param Test" />
</h:commandLink>

   code in stateless session bean:

public String test(){
     System.out.println("test() *******  ");
     return null;
}

   But i get the exception:

org.apache.jasper.JasperException: /sysMain.jsp(125,8) The function test must be used with a prefix when a default namespace is not specified

  I have also tried to invoke the method with an argument(an object's property). But the same exception.

  Could anyone help me?  Thanks a lot.