function addPageEmailLinks() {
    $('#diisrEmailPage')
    .replaceWith('<a href="#" class="diisrEmailPage" onclick="emailPageLink();">Email this page</a>')
}
function emailPageLink() {
    var strSubject = "Link to " + escape(document.title);
    var strBody = "The following link has been sent to you by <your name>.%0A";
    strBody += "Title: " + escape(document.title) + "%0A";
    strBody += "Link: " + escape(location.href) + "%0A%0A";

    var mailStr = "mailto:?Subject=" + strSubject +
                "&Body=" + strBody;
    window.open(mailStr);
}
_spBodyOnLoadFunctionNames.push("addPageEmailLinks");