Open ( Show ) jQuery UI Modal Dialog Popup Window on Page Load

In this article I will explain how to create Modal Popup Window using jQuery UI Modal Dialog in ASP.Net and how to open the modal popup as soon as page loads in browser.



Styles:

<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: 10px;
border-radius: 5px;
box-shadow: 0 2px 5px #000;
}
.cnt223 p{
clear: both;
color: #555555;
text-align: justify;
}
.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>

Scripts:
<script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.js"></script>
<script type="text/javascript">
    $("document").ready(function () {//if use ready,function will in page load
        var overlay = $('<div id="overlay"></div>');
        overlay.show();
        overlay.appendTo(document.body);
        $('.popup').show();
        $('.close').click(function () {//this is trigger when close button click
            $('.popup').hide();
            overlay.appendTo(document.body).remove();
            return false;
        });
    });
</script>

Body Container:

<div class="cnt223">
<!-- Before next step i planning to add my custom css and jquery library link i have my style if you want to downdload please check in description -->
<img src="images/close.png" alt="quit" class="x" id="x" />
<p>
This is the popup using css and jquery script...
<br /><br />
</p>
<a class="close" href="#" >Close</a>
</div>

</div>