jQuery(document).ready(function(){
   $(".box").live({
        mouseenter:
           function()
           {
$(".overlay", this).stop().animate({top:'-200px'},{queue:true,duration:500, easing: 'easeOutBounce'});
           },
        mouseleave:
           function()
           {
$(".overlay", this).stop().animate({top:'0px'},{queue:true,duration:500, easing: 'easeOutBounce'});
           }
       }
    );
});