title: Selenium KeyDown for keys not in the modifier
body: <p>As I know, selenium keyDown(keyUp) method is only available for keys in modifiers (SHIFT, ALT, CTRL). I need to press SPACE key a certain amount of time.</p>
  
  <p>I have a questions about key event handling in Selenium keyboard interface.</p>
  
  <p><strong>1. Why selenium does not permit keydown and keyup event for other general keys ?</strong></p>
  
  <p><strong>2. Is there any workaround to achieve this goal ?</strong></p>
  
  <p>For now, I used Robot class to implement this, but I don't want to use this.</p>