Try This
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server" CssClass="classTarget"></asp:TextBox>
.....
</ContentTemplate>
</asp:UpdatePanel>
in javascript
<script type="text/javascript" src="http://jqueryjs.googlecode.com/files/jquery-1.3.1.js">
</script>
<script type="text/javascript">
$(document).ready(function() {
Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler);
function EndRequestHandler(sender, args) {
$('.classTarget).datepicker({ dateFormat: 'dd-mm-yy' });
}
});
</script>
or
try this
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link rel="stylesheet" href="http://code.jquery.com/ui/1.10.3/themes/smoothness/jquery-ui.css" />
<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script type="text/javascript" src="http://code.jquery.com/ui/1.10.3/jquery-ui.js"></script>
<link rel="stylesheet" href="/resources/demos/style.css" />
<script type="text/javascript">
$(function () {
$("#datepicker").datepicker();
});
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="datepicker" runat="server" CssClass="classTarget"></asp:TextBox>
</ContentTemplate>
</asp:UpdatePanel>
</div>
</form>
</body>
</html>
