.graydiv  
   {  
    position: absolute;  
    background-color: #5B5B5B;  
    left: 250px;  
    top: 0px;  
    z-index: 10000;  
    display: none;  
   }  
  
   .ModalBackground  
   {  
    background-color: black;  
    filter: alpha(opacity=70);  
    opacity: 0.7;  
   }