public void connect(final String url, final IOCallback callback)
			throws MalformedURLException {
		if (setAndConnect(new URL(url), callback) == false) {
			if (url == null || callback == null)
				throw new RuntimeException("url and callback may not be null.");
			else
				throw new RuntimeException(
						"connect(String, IOCallback) can only be invoked after SocketIO()");
		}
	}
connects to supplied host using callback. Do only use this method if you
instantiate {@link SocketIO} using {@link #SocketIO()}.

@param url
           the url
@param callback
           the callback
src/io/socket/SocketIO.java