If you have Multiple radio buttons in single form then

var myRadio1 = $('input[name=radioButtonName1]'); var value1 = myRadio1.filter(':checked').val();

var myRadio2 = $('input[name=radioButtonName2]'); var value2 = myRadio2.filter(':checked').val();

This will works.......It is working for me......

If you have Multiple radio buttons in single form then

var myRadio1 = $('input[name=radioButtonName1]');
var value1 = myRadio1.filter(':checked').val();

var myRadio2 = $('input[name=radioButtonName2]');
var value2 = myRadio2.filter(':checked').val();

This is working for me.