title: Real time web page
body: <p>I want to build simple web based app, where users, for example, could push the spacebar button, and then do something further, like answer a question, and while other users at the same time only sees that this question is not available any more for answer. When user submits answer, everyone see it.</p>
  
  <p>All right, here is an example. I have seen TV shows, where four players have one button, if one or two of them know answer, they hit a button, and one lamp turns on and the first is allowed to answer, while other keeps their mouths shut. I want to build the same idea, but in the web.</p>
  
  <p>But problem is that, I don't know where to start, what keywords I should search for help on google and so on. I see, that it might work on HTML5, maybe JavaScript and so on.</p>
  
  <p>I have idea using Ajax, but request it every second to get latest actions made seems rubbish. Also I found one service called Pusher, but it  has limited users in one time, which doesn't fit my needs.</p>
  
  <p>I need just ideas. Thanks.</p>