/*This is where the magic happens!*/
div.box {
     /*Any properties you'd want the box to have.*/
     /*Would probably be position, dimension type stuff.*/
     /*Though personally I would have a div outside this
       to control the dimensions.*/
     border: 0px solid #000000;
     position: absolute;
	bottom: 158px;
     width: 654px;
	height: 80px
     z-index: 1000;
}
div.box_contents {
     background-color:transparent;
     height: 80px;
     position: relative;
     width: 654px;
     z-index: 1002;
}
div.box_background {
     background-color: white;
     height: 80px;
     filter:alpha(opacity=75); /* IE's opacity*/
     left: 0px;
     opacity: 0.75;
     position: absolute;
     bottom: 0px;
     width: 654px;
     z-index: 1001;
}