body{
background-color: #ffffff;}
h3, h4 {color: #780001;}
#mask {background-color: #000000;
text-align: center;
margin-top: -21px;
width: 100%;
height: 100%;
position: absolute;
z-index: 10;
filter:alpha(opacity=50);
-moz-opacity:0.5;
-khtml-opacity: 0.5;
opacity: 0.5;

}

#sitemask {background-color: #ffffff;
text-align: center;
margin-top: -21px;
width: 100%;
height: 100%;
position: absolute;
z-index: 20;

}


#age {background-color: #ffffff;
position: absolute;
width: 400px;
height: 200px;
top: 50%;
left: 50%;
padding: 20px;
margin-top: -100px; /*set to a negative number 1/2 of your height*/
margin-left: -200px; /*set to a negative number 1/2 of your width*/
border: 2px solid red;
z-index: 11;
}

.sitebtn {text-decoration: none;
color: #666666;
font-family: sans-serif;
font-size: 18px;
}
#sitechoice {background-color: #ffffff;
position: absolute;
width: 600px;
height: 300px;
top: 50%;
left: 50%;
padding: 20px;
margin-top: -150px; /*set to a negative number 1/2 of your height*/
margin-left: -300px; /*set to a negative number 1/2 of your width*/
border: 2px solid red;
z-index: 21;
}