.cbb {
    margin:1em 0;
    padding:0 10px;
    border:1px solid #666;
    background:#fff;
}
/* Normal styling */
.cb {margin:0 0;}
    /* Top corners and border */
.bt {
    height:12px;
    margin:0 0 0 18px;
    background:url(/cbb/box.png) no-repeat 100% 0;
}
.bt div {
    position:relative;
    left:-18px;
    width:18px;
    height:12px;
    background:url(/cbb/box.png) no-repeat 0 0;
    font-size:0;
    line-height:0;
}

    /* Bottom corners and border */
.bb {
    height:14px;
    margin:0 0 0 18px;
    background:url(/cbb/box.png) no-repeat 100% 100%;
}
.bb div {
    position:relative;
    left:-18px;
    width:18px;
    height:14px;
    background:url(/cbb/box.png) no-repeat 0 100%;
    font-size:0;
    line-height:0;
}

    /* Left border */
.i1 {
    padding:0 0 0 10px;
    background:url(/cbb/borders.png) repeat-y 0 0;
}
    /* Right border */
.i2 {
    padding:0 10px 0 0;
    background:url(/cbb/borders.png) repeat-y 100% 0;
}
    /* Wrapper for the content. Use it to set the background colour and insert some padding between the borders and the content. */
.i3 {
    display:block;
    margin:0;
    padding:0 4px 0 2px;
    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;}