How to use radio button on change event?

HTML code-sample

<fieldset>

    <legend>Search Options</legend>

    <input type="radio" name="Search" value="1" checked="checked" /> TextBox1

    <input type="radio" name="Search" value="2" /> TextBox2

    <input type="radio" name="Search" value="3" /> TextBox3

</fieldset>

JavaScript  code-sample

function searchSection(evt) {

        var val = $("input[name=Search]:checked").val();

        if (val == '1') {

            $('#1').show();

        } else if (val == '2') {

            $('#2').show();

        } else if (val == '3') {

            $('#3').show();

        }

 }

$('input[name=Search]:radio').change(searchSection);

Thank you,

For more detail, go to link 

http://stackoverflow.com/questions/13152927/how-to-use-radio-on-change-event