How to get selected radio button value in Javascript

You can use the jQuery :checked selector in combination with the val() method to find the value of certain radio button inside a group.

<script type="text/javascript">

    $(document).ready(function(){

        $("input[type='button']").click(function(){

            var radioValue = $("input[name='gender']:checked").val();

            if(radioValue){

                alert("Your are a - " + radioValue);

            }

        });

    });

</script>