jQuery get value of selected radio button

Question

The problem statement is simple. I need to see if user has selected a radio button from a radio group. Every radio button in the group share same id.

The problem is

Answer 1

In case you don't know the sepcific name or want to check all radio inputs in a form, you can use a global var to check for each radio group the value only once: `

        var radio_name = "";
        $("form).find(":radio").each(function(){
            if (!radio_name || radio_name != $(this).attr('name')) {
                radio_name = $(this).attr('name');
                var val = $('input[name="'+radio_name+'"]:checked').val();
                if (!val) alert($('input[name="'+radio_name+'"]:checked').val());
            }
        });`