.module {
  position: relative;
}

.module-fg {
  padding: 20px;
  position: relative;
  z-index: 10;
}

.module-fg .module-hd,
.module-fg .module-ft {
  overflow: hidden;
}

.module-bg {
  height: 100%;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
  z-index: 5;
  /* The following rule hits IE 6 only */
  _height: expression(this.parentNode.clientHeight+'px');
}

.module-bg .module-hd div,
.module-bg .module-bd div,
.module-bg .module-ft div {
  font-size: 0;
  overflow: hidden;
}

.module-bg .module-hd {
  left: 0;
  height: 20;
  overflow: hidden;
  position: absolute;
  top: 0;
  width: 100%;
}

.module-bg .module-hd .module-hd-l {
  background: transparent url(hd-l.png) no-repeat 0 0;
  float: left;
  height: 20px;
  width: 20px;
  /* The following rule hits IE 6 only */
  _margin-right: -3px;
}

.module-bg .module-hd .module-hd-r {
  background: transparent url(hd-r.png) no-repeat 0 0;
  float: right;
  height: 20px;
  width: 20px;
  /* The following rule hits IE 6 only */
  _margin-left: -3px;
}

.module-bg .module-hd .module-hd-c div {
  background: transparent url(hd-c.png) repeat-x 0 0;
  height: 20px;
}

.module-bg .module-ft {
  bottom: 0;
  left: 0;
  overflow: hidden;
  position: absolute;
  width: 100%;
}

.module-bg .module-ft .module-ft-l {
  background: transparent url(ft-l.png) no-repeat 0 0;
  float: left;
  height: 20px;
  width: 20px;
  /* The following rule hits IE 6 only */
  _margin-right: -3px;
}

.module-bg .module-ft .module-ft-r {
  background: transparent url(ft-r.png) no-repeat 0 0;
  float: right;
  height: 20px;
  width: 20px;
  /* The following rule hits IE 6 only */
  _margin-left: -3px;
}

.module-bg .module-ft .module-ft-c div {
  background: transparent url(ft-c.png) repeat-x 0 0;
  height: 20px;
}

.module-bg .module-bd {
  bottom: 20px; /* Bottom should be height of .module-ft */
  left: 0;
  overflow: hidden;
  position: absolute;
  top: 20px; /* Top should be height of .module-hd */
  width: 100%;
}

.module-bg .module-bd .module-bd-l {
  background: transparent url(bd-l.png) repeat-y 0 0;
  float: left;
  height: 100%;
  width: 20px;
  /* The following rule hits IE 6 only */
  _margin-right: -3px;
}

.module-bg .module-bd .module-bd-r {
  background: transparent url(bd-r.png) repeat-y 0 0;
  float: right;
  height: 100%;
  width: 20px;
  /* The following rule hits IE 6 only */
  _margin-left: -3px;
}

.module-bg .module-bd .module-bd-c{
  height: 100%;
}

.module-bg .module-bd .module-bd-c div {
  background: #fff url(bd-c.png) repeat-x 0 100%;
  height: 100%;
}

.module-bg  .module-bd {
  /* The following rule hits IE 6 only */
  _height: expression(Math.floor(this.parentNode.clientHeight-(this.nextSibling ? this.nextSibling.clientHeight : 0)-(this.previousSibling ? this.previousSibling.clientHeight : 0))+'px');
  overflow: hidden;
}

.module-bg .module-bd .module-bd-l,
.module-bg .module-bd .module-bd-r,
.module-bg .module-bd .module-bd-c div {
  /* The following rule hits IE 6 and IE 7 only */
  *height: 10000px;
}

Authour: Mike Rumble (@rumble)

Super module CSS

css, module

CSS