//--------- START CODE - animation code ------------
animatedcollapse.addDiv('div1', 'fade=3,speed=300,group=pets,persist=1,hide=1');
animatedcollapse.addDiv('div2', 'fade=3,speed=300,group=pets,persist=1,hide=1');
animatedcollapse.addDiv('div3', 'fade=3,speed=300,group=pets,persist=1,hide=1');
animatedcollapse.addDiv('inviteCommboxId1', 'fade=3,speed=300,hide=1');
animatedcollapse.addDiv('inviteCommboxId2', 'fade=3,speed=300,hide=1');
animatedcollapse.init();
//--------- END CODE - animation code ------------
jQuery("#commentbutton").click(function() {
postComment("commentbox");
});
jQuery("#commentbutton2").click(function(){
postComment("commentbox2");
});
jQuery("#image-frame .showOnMouseOwer").slideUp();
window['lasVegasInProcess'] = false;
window['needToCloselasVegasInProcess'] = false;
jQuery("#image-frame").hover(function() {
if(window['lasVegasInProcess']) return;
window['lasVegasInProcess'] = true;
jQuery("#image-frame .showOnMouseOwer").slideDown('slow', function() {
if(window['needToCloselasVegasInProcess']) {
jQuery("#image-frame .showOnMouseOwer").slideUp('slow', function() {
window['lasVegasInProcess'] = false;
window['needToCloselasVegasInProcess'] = false;
});
} else {
window['lasVegasInProcess'] = false;
}
});
}, function() {
if(window['lasVegasInProcess']) {
window['needToCloselasVegasInProcess'] = true;
return;
}
window['lasVegasInProcess'] = true;
jQuery("#image-frame .showOnMouseOwer").slideUp('slow', function() {
window['lasVegasInProcess'] = false;
});
});

sans avoir regardé leur code moi je ferais avec jQuery

$('#wrapper').hover(
  function() {
    $('#bloc_haut').slideDown();
    $('#bloc_bas').slideDown();
  },
  function() {
    $('#bloc_haut').slideUp();
    $('#bloc_bas').slideUp();
  }
);

<div id="wrapper">
  <div id="bloc_haut"></div>
  <div id="image"><img></div>
  <div id="bloc_bas"></div>
</div>