<script src="~/Scripts/jquery-2.1.1.js"></script>
<script type="text/javascript">
$(document). ready(function () {
$(document).on("click", "#radio1", function (e) {
if ($(this).is(":checked"))
{
alert("true");
}
});
});
</script>
@Html.RadioButtonFor(model => model.radio1, new { @id = "radio1", @class = "radio" })
i Hope this helps u