#OuterTableCellOverlay
{
    background-color: Gray;  
    filter:alpha(opacity=40);
	-moz-opacity:0.4;
	-khtml-opacity: 0.4;
	opacity: 0.4;	
    z-index: 999;
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;     
                       
}

#InnerTableCellOverlay
{
     margin:20% 40% 40% 40%;    
    text-align: center;        
}