function email(spanId, name, domainPre, domainExt) {
    var span;
    var address;
    span = document.getElementById(spanId);

    address = name;
    address += "@";
    address += domainPre;
    address += ".";
    address += domainExt;

    span.innerHTML = "<a href=\"mailto:" + address + "\">" + address + "</a>";
}