<script>
$(document).ready(function(){
$( ".leftbar" ).mouseenter(function() {
$( "body" ).addClass( "myclass", 1000, "easeOutBounce" );
});
});

$(document).ready(function(){
$( ".leftbar" ).mouseleave(function() {
$( "body" ).removeClass( "myclass", 1000, "easeOutBounce" );
});
});
</script>