function show_tab(link) {
  link = link.gsub(/http:\/\/.+\//, '').gsub(/\#/, '');
  $$('#sidebox .tab').each(function(div) {
    if(div.id == link)
      div.show();
    else
      div.hide();
  });
}
$(document).observe('dom:loaded', function(){
  $$('#tabs li a').each(function(a) {
    a.observe('click', function(e) {
      show_tab($(this).href);
      Event.stop(e);
    });
  });
  Event.observe($('event1'), 'click', function(event) {
       $('event1').className = 'active news';
       $('event2').className = 'active1 twitter';
       $('event3').className = 'inactive chic';
       Event.stop(event);
   });
   Event.observe($('event2'), 'click', function(event) {
       $('event1').className = 'inactive news';
       $('event2').className = 'active2 twitter';
       $('event3').className = 'inactive chic';
       Event.stop(event);
   });
   Event.observe($('event3'), 'click', function(event) {
       $('event1').className = 'inactive news';
       $('event2').className = 'active3 twitter';
       $('event3').className = 'active chic';
       Event.stop(event);
   });
  show_tab('#news');
});