function emailUs(userName,domain){
  domain = (domain == void 0 ) ? "":domain;
  var at = "@";
  
  if (userName == ""){
    userName = "error";
  }
  
  if (domain == ""){
    domain = "odu" + "." + "ed" + "u";
  }
  
  var wholeEmailAddress = userName + at + domain;
  
  var linkAndAll = "mailto:" + wholeEmailAddress;
  
  window.location.href = linkAndAll;
}