// Ascot Validate Email

function validate(f) {
  var msg = "";
  
  for (i = 0; i < f.length; i++) {
    var data = f.elements[i];

    if (data.type == "text") {
      if (data.name == "attention") {
         if (isEmpty (data.value)) {
            msg = "  -- Attention is a required field.\n";
            break;
         }
      }
      if (data.name == "name") {
	     if (isEmpty (data.value)) {
            msg = "  -- Name is a required field.\n";
            break;
         }
      }
      // make sure zip is integers only
      if (data.name == "temail") {
         if (isEmpty (data.value)) {
            msg = "  -- Email is a required field.\n";
            break;
         }
		 if (!isEmail(data.value)) {
            msg = "  -- Email address is invalid.\n";
            break;
         }
      }
    }
  }

  if (msg) {
     alert("ERROR: Email could not be sent for the following reasons:\n" + msg);
     return false;
  }
  return true;
}

function isEmpty(s)
{   return ((s == null) || (s.length == 0))
}

function isEmail (s)
{   if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
   
    // is s whitespace?
    if (isWhitespace(s)) return false;
    
    // there must be >= 1 character before @, so we
    // start looking at character position 1 
    // (i.e. second character)
    var i = 1;
    var sLength = s.length;

    // look for @
    while ((i < sLength) && (s.charAt(i) != "@"))
    { i++
    }

    if ((i >= sLength) || (s.charAt(i) != "@")) return false;
    else i += 2;

    // look for .
    while ((i < sLength) && (s.charAt(i) != "."))
    { i++
    }

    // there must be at least one character after the .
    if ((i >= sLength - 1) || (s.charAt(i) != ".")) return false;
    else return true;
}