jQuery - Modal Window

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>
  <title>Hello!</title>
  <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
</head>
<script type="text/javascript">
$(document).ready(function() {
    //select all the a tag with name equal to modal
    $('a[name=modal]').click(function(e) {
        //Cancel the link behavior
        e.preventDefault();
        //Get the A tag
        var id = $(this).attr('href');

        //Get the screen height and width
        var maskHeight = $(document).height();
        var maskWidth = $(window).width();

        //Set height and width to mask to fill up the whole screen
        $('#mask').css({'width':maskWidth,'height':maskHeight});

        //transition effect
        $('#mask').fadeIn(1000);
        $('#mask').fadeTo("slow",0.8);

        //Get the window height and width
        var winH = $(window).height();
        var winW = $(window).width();

        //Set the popup window to center
        $(id).css('top',  winH/2-$(id).height()/2);
        $(id).css('left', winW/2-$(id).width()/2);

        //transition effect
        $(id).fadeIn(2000);

    });

    //if close button is clicked
    $('.window .close').click(function (e) {
        //Cancel the link behavior
        e.preventDefault();
        $('#mask, .window').hide();
    });

    //if mask is clicked
    $('#mask').click(function () {
        $(this).hide();
        $('.window').hide();
    });

});
</script>
<style>
#mask {
  position:absolute;
  z-index:8000;
  background-color:#f2f2f2;
  display:none;
}
#boxes .window {
  position:absolute;
  width:440px;
  height:200px;
  display:none;
  z-index:9999;
  padding:20px;
}
 #boxes #dialog {
  width:375px;
  height:203px;
  background:#fff;
}
</style>

<body>

<!-- #dialog is the id of a DIV defined in the code below -->
<a href="#dialog" name="modal">Click Me</a>
<div id="boxes">
    <div id="dialog" class="window">
        <b>MODAL WINDOW</b> -><a href="#" class="close">Close it</a>
        </div>
    <div id="mask"></div>
</div>

<div class="text">

<h1> Test </h1> <p>

<img src="http://profile.ak.fbcdn.net/hprofile-ak-snc4/188050_169149283138446_2377278_n.jpg" alt="alt" />

</div>


</body>

</html>