.yui3-widget-stacked .yui3-widget-shim {
    opacity:0;
    filter:alpha(opacity=0);
    position:absolute;
    border:none;
    top:0px;
    left:0px;
    padding:0;
    margin:0;
    z-index:-1;
    width:100%;
    height:100%;
    /*
       We'll be setting these programmatically for IE6,
       to account for cases where height is not set
    */
    _width:0;
    _height:0;
}