JavaWorld Forums: xmlHttp.responseXML is returning null

Hi all,
I am new to Ajax and developping a web application on using Ajax.
My script is successfully requesting the server and getting the responseText. But when i want to access the responseXML
it is giving null.
I am recieving XMLHttpRequest.responseXML as null each time I access it, where as XMLHttpRequest.responseText is returning every thing except the xml that I am writing at the server.

My code at server is as follows:
Code:


PrintWriter out = response.getWriter();
			String valid;
			response.setContentType("text/xml");
            response.setHeader("Cache-Control", "no-cache");  
             if (user == null) { //checking the availability  to update the page. 
             valid = "true";                	                             
             request.setAttribute("validity", valid );
             String validity =toXml(valid);
             out.write(validity);
             }else
                 valid = "false";   				                 request.setAttribute("validity", valid );
                 String validity = toXml(valid);        			 out.write(validity);

The method toXml is ;
Code:


                private String toXml(String v) {
		StringBuffer xml = new StringBuffer();
	    xml.append("<?xml version=\"1.0\"?>\n");
	    xml.append("<ajax generated=\""+System.currentTimeMillis()+"\" total=\""+0+"\">\n");
	    xml.append("<validity>");
	      xml.append(v);
	      xml.append("</validity>");
		// TODO Auto-generated method stub
		// Replace println methods to thsi part
		return xml.toString();
	}

I am expecting my code to return <validity>true or false </validity> on XMLHttpRequest.responseXML.getElemenyByTagName("validity");

Can any one please tell me where am I going wrong.

Thanx & Regards:
Yash(md_sagri@yahoo.com)

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