body{
margin: 0px;
margin-bottom: 54px;
}

#botbar { width: 100%; height: 49px; background: red; z-index: 100; background:url(bg_r.gif) repeat-x bottom; text-align:center; }
/*
#botbar{
height: 100px;
width:100%;
background:#FF9900;
position:fixed;
bottom: 0px;
}
*/

* html #botbar { /*\*/position: absolute; top: expression( ( 0 - botbar.offsetHeight + ( document.documentElement.clientHeight ? document.documentElement.clientHeight : document.body.clientHeight ) + ( ignoreMe = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop ) ) + 'px' );/**/ } 

#foo > #botbar { position: fixed; bottom: 0; } 

.content {

}