title: Automatic tab switch in javascript or jquery
body: <p>I built a featured tabbing system (4 tabs) with jquery. It works manually but I want to make it loop automatically, i.g.  every 5 seconds. I can trigger each tab with the click even but I don't know how to go back to the beginning from 1st tab once it reach the last tab. </p>
  
  <p>The coding too long to past here, so I have made a jsfiddle link to it: <a href="http://jsfiddle.net/ZSPX3/" rel="nofollow">http://jsfiddle.net/ZSPX3/</a></p>
  
  <p>I just wanna iterate through each tab and click them each, then start from the beginning of the tab again, as in I want an infinite slideshow. But I'm stuck...</p>
  
  <p>I don't want any plugins, I wanna learn how to do this with my own hand, please.</p>
  
  <p>Many thanks</p>