I have a simple little script which I am using to set a cookie:

function setCookie(cname, cvalue, exdays) {

    var d = new Date();

    d.setTime(d.getTime() + (exdays*24*60*60*1000));

    var expires = expires=+d.toUTCString();

    document.cookie = cname + = + cvalue + ;  + expires;

}

The problem I have this cookie is only set on one page, not across the whole domain.

How can I adjust this function so that the cookie remains across the whole domain?