// login to twitter
public void loginToTwitter(String username, String password) throws IOException {
String url = "http://twitter.com/" + username + "/followers";
HtmlPage loginPage = webClient.getPage(url);
HtmlElement nameInput = loginPage.getElementById("username_or_email");
HtmlElement passwordInput = loginPage.getElementById("password");
HtmlElement signInButton = loginPage.getElementById("signin_submit");
nameInput.setAttribute("value", username);
passwordInput.setAttribute("value", password);
HtmlPage followersPage = signInButton.click();
System.out.println("login successful");
}