$(function(){
  var popupHide = 0;
  $('.content').hover(function(){
   if (popupHide == 0){
    $('em', this).animate({opacity: "show", top: "-80"}, "slow");
    popupHide = 1;
   }else {
     $('em', this).animate({opacity: "hide", top: "-100"}, "fast");
     popupHide = 0;
   }
  });
 });