$(document).ready(function() {
  $("#slider").easySlider({
    auto: true,
    continuous: true,
    controlsShow: false,
    prevId: 'prevButton',
    nextId: 'nextButton',
    animationComplete: slideImageCompleted,
                pause: 6000
  });
});

function onAfter() {
  var founddesc = $("#" + this.alt);
}

function slideImageCompleted(index) {
  var foundDesc = $("#description" + (index+1));
  $("#produktteaser > div.description").each(function(i){
    $(this).css("display", "none");
  });
  $(foundDesc).css("display", "block");
}