JQuery Check Textbox Value is Empty or Null

Here you can check that Textbox value is empty or null using JQuery.

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

<head>
    <title>jQuery Check if string empty or null</title>
    <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.js"></script>
    <script type="text/javascript">
        $(function() {
            $('#btnCheck').click(function() {
                var txt = $('#txtName');
                if (txt.val() != null && txt.val() != '') {
                    alert('you entered text ' + txt.val())
                } else {
                    alert('Please enter text')
                }
            })
        });
    </script>
</head>

<body>
    <div>
        Enter Text:
        <input type="text" id="txtName" />
        <input type="button" id="btnCheck" value="Check" />
    </div>
</body>

</html>