javascript

javascript

hello, I´m new to jquerymobile, I call the follow page with this
$.mobile.changePage("contenido/contenido3.html", "pop",false,true); I do not understand the why the alert message is not displayed. Thanks.

<!DOCTYPE html>
<html>
    <head>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="http://code.jquery.com/mobile/1.0a2/jquery.mobile-1.0a2.min.css" />
    <link rel="stylesheet" href="docs/_assets/css/jqm-docs.css" />
    <script src="http://code.jquery.com/jquery-1.4.4.min.js"></script>
    <script type="text/javascript" src="http://code.jquery.com/mobile/1.0a2/jquery.mobile-1.0a2.min.js"></script>
</head>
<body>

<div data-role="page">
    <div data-role="header" >
        <h1>Page Title</h1>
    </div><!-- /header -->
    <div data-role="content">   
        <a href="#" data-role="button">Link button</a>    
        <input type="button" id="btn1" value="Input type=button" />
    </div><!-- /content -->
    <div data-role="footer">
        <h4>Page Footer</h4>
    </div><!-- /footer -->
</div><!-- /page -->
<script>
$('#btn1').'click'(function() {
alert('boton2"');
});
</script>
</body>
</html>