#mask
{
position: absolute; /* important */
top: 0px; /* start from top */
left: 0px; /* start from left */
height: 100%; /* cover the whole page */
width: 100%;  /* cover the whole page */
display:none; /* don't show it '*/
z-index: 2;

/* styling below */
background-color: #000000;
}

.modal_window
{
position:absolute; /* important so we can position it on center later */
display:none; /* don't show it */
z-index: 3;

/* styling below */
color: white;
}

/* style a specific modal window  */
.modal_window
{
padding: 10px;
border: 1px solid gray;
background: #FFFFFF;
font-family: arial;
font-size: 11px;
color: #0e0e0e;
}