[jQuery] Problem with slide toggle

[jQuery] Problem with slide toggle


Hi,
I was practicing some examples , on click of a button a
calendar slidesdown dynamically, but whenever I am clicking some
content on the calendar its geting posted back and its dissapearing,
my code is as follows
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1" />
<title>JQuery Collapse</title>
<script src="jquery-1.3.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(document).ready(function()
{
$("#click_here").click(function(event) {
//event.preventDefault();
$("#div1").slideToggle();
});
$("#div1 a").click(function(event) {
event.preventDefault();
$("#div1").slideUp();
});
});
</script>
<style type="text/css">
body {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 20px;
color: #666666;
}
a{color:#993300; text-decoration:none;}
#div1 {
width:70%;
display: none;
padding:5px;
border:2px solid #EFEFEF;
background-color:#FEFEFE;
}
#click_here{
padding:5px;
border:2px solid #FFEFEF;
background-color:#EFEFEF;
}
</style>
</head>
<body>
<form runat ="server" id="frmTest">
<input type="button" id="click_here" value="Click Here">
<div id="div1">
<a href="#" class="close">[x]</a>


<asp:Calendar ID="cl1" runat="server"></asp:Calendar>
</div>
</form>
</body>
</html>