.grayBox{ 
    position: fixed; 
    top: 0%; 
    left: 0%; 
    width: 100%; 
    height: 100%; 
    background-color: black; 
    z-index:1001; 
    -moz-opacity: 0.8; 
    opacity:.80; 
    filter: alpha(opacity=80); 
} 
.box_content { 
    position: absolute; 
    top: 25%; 
    left: 35%; 
    right: 30%;
    width: auto; 
    padding: 16px; 
    z-index:1002; 
    overflow: auto; 

}