html, body {margin:0; padding:0; width:100%; height:100%; overflow:hidden;}
#background{position:absolute; z-index:1; width:100%; height:100%;}
#scroller {position:absolute; width:100%; height:100%; top:0; left:0; overflow:auto; z-index:2;} 
#content {padding:20px 0px 10px 0px;}
.transparent_class {opacity: 0.60; -ms-filter: 'alpha (opacity=60)'; filter:alpha(opacity=60); -moz-opacity:0.60; -khtml-opacity: 0.60;}