#overlay {

     visibility: hidden;

     position: absolute;

     left: 0px;

     top: 0px;

     width:100%;

     height:100%;

     text-align:center;

     z-index: 1000;

     background-color:#eee;

   
-moz-opacity: 0.8; 
	    opacity:.80; 
	    filter: alpha(opacity=80); 
}



#overlay div {

     width:300px;

opacity: 1.0;
 -moz-opacity: 1.0;
 filter:alpha(opacity=100);

     margin: 100px auto;

     background-color: #fff;

     border:1px solid #000;

     padding:15px;

     text-align:center;
z-index:1001; 

}