function slideSwitch() {
    var $active = $('#slideshow DIV.active');

    if ( $active.length == 0 ) $active = $('#slideshow DIV:last');

    var $next =  $active.next().length ? $active.next() : $('#slideshow DIV:first');

    $active.addClass('last-active');

    $next.css({opacity: 0.0})
        .addClass('active')
        .animate({opacity: 1.0}, 1000, function() {
            $active.removeClass('active last-active');
        });
}

$(function() {
  $("#slideshow DIV").css({opacity: 0.0});
  $("#slideshow DIV:first").css({opacity: 1.0});

  var playSlideShow = setInterval( "slideSwitch()", 5000 );
  
  $("#slideshow").hover(function(){
    clearInterval(playSlideShow);
  },function(){
    playSlideShow =  setInterval( "slideSwitch()", 5000 );
  });

});