title: simulate key press in selenium webdriverjs
body: <p>I am using Selenium WebDriverJS to write a test. Now I need to press the key down in keyboard. Is it possible to simulate key press on the selenium webdriverJS ?
  if yes how ?</p>
  <p>In java we do this :</p>
  <pre><code>driver.findElement(Locator).sendKeys(Keys.ARROW_DOWN);
  </code></pre>
  <p>Thank you.</p>