Checkbox tabindex with jQuery

http://stackoverflow.com/questions/16004390/how-to-get-tabindex-of-a-checkbox-with-jquery

HTML

<ul>
    <li><input type="checkbox" tabindex="1" /></li>
    <li><input type="checkbox" tabindex="2" /></li>
    <li><input type="checkbox" tabindex="3" /></li>
</ul>
<p>
    <button>Submit</button>
</p>

JavaScript

$(function () {
    $("button").on("click", function () {
        $.each($("input[type=checkbox]"), function (idx, data) {
            if ($(this).is(":checked")) {
               console.log($(this).prop("tabindex")); 
            }
        });
    });
});