JQuery $ .cookie (domain :) calling cookie not to set

Hi, the following code sets Cookies based on the identifier of the link that was clicked (this value), it works, but what needs to be done to set the domain, I read how to do this by setting the domain in the values, when I install domin, it doesn’t will set a cookie at all

AT:

jQuery(document).ready(function(){
    $(".htabs a").click(function(e){
        $.cookie('siteVistedCookie', $(this).attr("id"), { expires: 7, path: '/'});
        });
    });

Does not work

jQuery(document).ready(function(){
    $(".htabs a").click(function(e){
        $.cookie('siteVistedCookie', $(this).attr("id"), { expires: 7, path: '/', domain: 'www.xample.com' });
        });
    });