check if all radio buttons are checked on the page

check if all radio buttons are checked on the page.js

  //checking if all radio butons are checked
    $(":radio").change(function() {

        //console.log('radio change ');
        var names = {};
        $(':radio').each(function() {
            names[$(this).attr('name')] = true;
        });

        //console.dir(names);
        var count = 0;
        $.each(names, function() {
            count++;
        });
        //console.log('count' + count);
        //console.log('checked length' + $(':radio:checked').length );

        //all checked
        if ($(':radio:checked').length === count) {
            alert("all answered");
        }
    });