The changed event not attach to a radio button group properly using this approach. In 1.7.1 or 1.9.1 it does work properly in 1.7.2 please see this working example that can be broken by changing the JQuery version. http://jsfiddle.net/zn7q2/2/

$(document).ready(function ()

{

$("input[name=DateSearchOptions.Test]:radio").change(function() {alert('Changed');})

});