<script type="text/javascript" src="https://code.jquery.com/jquery-1.8.2.js"></script>
<style type="text/css">
#overlay {
position: fixed;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-color: #000;
filter:alpha(opacity=70);
-moz-opacity:0.7;
-khtml-opacity: 0.7;
opacity: 0.7;
z-index: 100;
display: none;
}
.cnt223 a{
text-decoration: none;
}
.popup{
width: 100%;
margin: 0 auto;
display: none;
position: fixed;
z-index: 101;
}
.cnt223{
min-width: 600px;
width: 600px;
min-height: 150px;
margin: 100px auto;
background: #f3f3f3;
position: relative;
z-index: 103;
padding: 15px 35px;
border-radius: 5px;
box-shadow: 0 2px 5px #000;
}
.cnt223 p{
clear: both;
    color: #555555;
    /* text-align: justify; */
    font-size: 20px;
    font-family: sans-serif;
}
.cnt223 p a{
color: #d91900;
font-weight: bold;
}
.cnt223 .x{
float: right;
height: 35px;
left: 22px;
position: relative;
top: -25px;
width: 34px;
}
.cnt223 .x:hover{
cursor: pointer;
}
</style>
<script type='text/javascript'>
$(function(){
var overlay = $('<div id="overlay"></div>');
overlay.show();
overlay.appendTo(document.body);
$('.popup').show();
$('.close').click(function(){
$('.popup').hide();
overlay.appendTo(document.body).remove();
return false;
});


 

$('.x').click(function(){
$('.popup').hide();
overlay.appendTo(document.body).remove();
return false;
});
});
</script>
<div class='popup'>
<div class='cnt223'>
<h1>Are you 21 or older?</h1>
<a href='' class='close'>Yes</a>
&nbsp;
<a href='www.google.com'> No </a>
</p>
</div>
</div>