function slideSwitch()
{
   var active = jQuery('#rotating_reactions li.active');
   if ( active.length == 0 )
     active = jQuery('#rotating_reactions li:first');
   
   var next =  active.next().length  ?  active.next()  :  jQuery('#rotating_reactions li:first');
        
   active.addClass('last-active');
   next.css({opacity: 0.0})
      .addClass('active')
      .animate({opacity: 1.0}, 750, function() {
         active.removeClass('active last-active');
      });
      active.animate({opacity: 0.0}, 750);
}
jQuery(document).ready(function(){
   setInterval('slideSwitch()', 5000 );
});