/* BASIC css start */
.bt1 {position:absolute; bottom:19%; right:2%; width:90px; }
.bt2 {position:absolute; bottom:15%; right:17%; width:90px;}
.bt3 {position:absolute; bottom:18%; right:10%; width:70px;} 
#contents div a img {display:block; width:100%; } 
#contents div { position:relative; font-size:0;}
/* BASIC css end */