.ny_top{
    background:url(./ntop_bg.jpg) repeat-x top center;
    height:0;
    transition:all 0.5s;
}
.shown{
    height:68px;
}
.ny_top_img{
    background:url(./nytop.jpg) no-repeat top center;height:68px;
}
#ny_banner{
    position: relative;
    top:0;
    width:100%;
    left:0;
    background:url(./newyear_bg.jpg) repeat-x top center;
    height:860px;
    transition:all 0.5s;
  	z-index:9999;
}
.ny_banner_img{
    background:url(./newyear.jpg) no-repeat top center;height:860px;
    transition:all 0.5s;
}
#ny_banner.hide{
    height:0;
}
#ny_banner.hide .ny_banner_img{
    height:0;
}