how can i provide the functionality for document.write()

hai all 
    I need to evalute the javascript functions in the
htmlpage using the rhino. For this i am working with
httpunit part with evaluate expression. 
But i am getting the errors . Please help me out 
how to provide the functionlity for 
document.write();
I am trying this but nothing is getting adedd to
documnet
wc.getCurrentPage().getScriptableObject().evaluateExpression("document.write('this
is anoher node ')");

when i am trying to append a new text node to the dom
i am getting the error 

Exception: org.w3c.dom.DOMException:
WRONG_DOCUMENT_ERR: A node is used in a different
document than the one that created it.

here is the code fragment

 WebResponse response = wc.getResponse(
"http://localhost:8080/New/test.html");
String response1 =
response.getLinkWith("").getURLString();
 
  Document doc= wc.getCurrentPage().getDOM();
            
System.out.println(doc.getElementsByTagName("*").getLength());

wc.getCurrentPage().getDOM().appendChild(doc.createTextNode("hallo
world"));

how could i provide this functionality



		
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