#banner_container {
   width: 950px;
   height: 110px;
   position: relative;
}
#banner_container img {
   width: 950px;
   height: 110px;
   position: absolute;
   left: 0;
   top: 0;
   z-index: 0;
}

img.show {
   display: none;
   z-index: 1 !important;  
}

#home_pictures {
   width: 190px;
   height: 146px;
   position: relative;
}
#home_pictures img {
   width: 190px;
   height: 146px;
   position: absolute;
   left: 0;
   top: 0;
   z-index: 0;
}