.middle {
display: block;
background: #f36f21;
width: 535px;
background-image: url(../img/b1_middle.gif);
background-repeat: repeat-y;
margin: 10px 5px 5px 15px;;
}
.top {
background-image: url(../img/b1_top.gif);
background-position: top left;
background-repeat: no-repeat;
}
.bottom {
background-image: url(../img/b1_bottom.gif);
background-position: bottom left;
background-repeat: no-repeat;
padding: 15px 30px 30px 15px;
min-height: 450px;
}

* html .bottom {
height: 450px;
}