$(document).ready(function(){
 
$("h1").hover(function() {
$(this).next("em").stop(true, true).animate({opacity: "show", top: "60"}, "slow");
}, function() {
$(this).next("em").animate({opacity: "hide", top: "100"}, "fast");
});

});



    function toggle_visibility(id) {
       var e = document.getElementById(id);
       if(e.style.display == 'block')
          e.style.display = 'none';
       else
          e.style.display = 'block';
    }