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			// the xml text manually to create a dom tree we can use.

			if (xhRequest.responseText && (!resp || !resp.firstChild))
				manualParseRequired = true;
		}
	}
	else if (!resp)
	{
		// The server said it sent us data, but for some reason we don't have
		// an XML DOM document. Some browsers won't auto-create an XML DOM
		// unless the server used a content-type of "text/xml" or "application/xml".
		// Try to manually parse the XML string, just in case the server
		// gave us an unexpected Content-Type.

		manualParseRequired = true;
	}

	if (manualParseRequired)
		resp = Spry.Utils.stringToXMLDoc(xhRequest.responseText);

	if (!resp  || !resp.firstChild || resp.firstChild.nodeName == "parsererror")