function validateUsernameForm()
  {
    username = document.getElementById("username");
    emailAddress = document.getElementById("emailAddress");
    theform = document.getElementById("usernameform");
    if ((username == "" || username.value == "") && (emailAddress == "" || emailAddress.value == "")) {
      alert("Either user name or email address must be entered.");
      return false;
    } else if ((username != "" && username.value != "") && (emailAddress != "" && emailAddress.value != "")) {
      alert("Only one of user name or email address must be entered.");        
      return false;
    }
      return true;
    
  }
  
      function validateHintForm()
      {
        hintanswer = document.getElementById("hintanswer");
        theform = document.getElementById("hintform");
        if (hintanswer == "" || hintanswer.value == "") {
          alert("A hint answer must be entered.");
          return false;
        } else {
          return true;
        }
      }