.graybox
{
    top: -100px;
    left: -275px;
    height: 110%;
    width: 126%;
    -moz-opacity: 0.90;
    filter: alpha(opacity=90);
    opacity: 0.90;
    z-index: 8;
    position:absolute;
    background-color: #C0C0C0;
}
.dvMiddle
{    
    top:100px;
    left:260px;           
    position:absolute;            
    z-index:9;
}  

.dvAlert
{
    border:1px solid #000;
    top:100px;
    left:260px;           
    position:absolute;            
    z-index:10;
}