.bt {
 height:17px;
  margin:0 0 0 18px;
  background:url(http://www.dwalk.co.jp/images/box.png) no-repeat 100% 0;
}

.bt div {
 position:relative;
  left:-18px;
 width:18px;
 height:17px;
  background:url(http://www.dwalk.co.jp/images/box.png) no-repeat 0 0;
  font-size:0;
  line-height:0;
}

.bb {
  height:14px;
  margin:0 0 0 12px;
  background:url(http://www.dwalk.co.jp/images/box.png) no-repeat 100% 100%;
}

.bb div {
  position:relative;
  left:-12px;
 width:12px;
 height:14px;
  background:url(http://www.dwalk.co.jp/images/box.png) no-repeat 0 100%;
 font-size:0;
  line-height:0;
}

.i1 {
  padding:0 0 0 12px;
 background:url(http://www.dwalk.co.jp/images/borders.png) repeat-y 0 0;
}

.i2 {
 padding:0 12px 0 0;
 background:url(http://www.dwalk.co.jp/images/borders.png) repeat-y 100% 0;
}

.i3 {
  display:block;
  margin:0;
 padding:1px 10px;
 background:#fff;
}

 /* Make the content wrapper auto clearing so it will contain floats (see http://positioniseverything.net/easyclearing.html). */
.i3:after {
  content:"."; 
 display:block; 
 height:0; 
  clear:both; 
  visibility:hidden;
}
.i3 {display:inline-block;}
.i3 {display:block;}