title: How to fill up form using CasperJS without form tag
body: <p>I'm new to CasperJS and I'm having problems in logging in into this site <a href="http://weibo.com/login.php" rel="nofollow">http://weibo.com/login.php</a></p>
  
  <p>here's what I've tried </p>
  
  <pre><code>this.fill('form#contact-form', {
      'username':    'test@test.com',
      'password':    'anypassword',
  
  }, true);
  </code></pre>
  
  <p>I can't used that since it has no form. </p>
  
  <p>so I tried a different method using sendKeys.</p>
  
  <pre><code>this.sendKeys('.W_input ', 'tinkerbell@gmail.com');
  </code></pre>
  
  <p>Now my problem in here is that the input text has no ID in it, only a CLASS and both username and password have the same CLASS in it. how can i type into that textbox using only that class? or is it possible to use sendKeys using XPath?</p>