function AddReferralCode() {
    var links = this.getElementsByTagName("A");
    if (links && (links.length != 0)) {
         var smugLink = links.item(0);
         smugLink.href = "http://www.smugmug.com/?referrer=pMdsH2mr0Wnjo";
    }
}

YE.onAvailable('footer', AddReferralCode);
YE.onAvailable('header', AddReferralCode);