function validRequired(formField,fieldLabel)
{
        var result = true;

        if (formField.value == "")
        {
                alert('Please enter a value for the "' + fieldLabel +'" field.');
                formField.focus();
                result = false;
        }
	else
	{
	        formField.value = trimSpaces(formField.value);
	}

        return result;
}

function allDigits(str)
{
        var result = true;
        var charset = "0123456789";
        for (var i=0;i<str.length;i++)
	{
                if (charset.indexOf(str.substr(i,1))<0)
                {
                        result = false;
                        break;
                }
	}
        return result;
}

function validSequence(str)
{
        var result = true;
        var charset = "bjouxz";
        str = str.toLowerCase();
        for (var i=0;i<str.length;i++)
                if (charset.indexOf(str.substr(i,1))>= 0)
                {
                        result = false;
                        break;
                }

        return result;
}

function isEmailAddr(email)
{
  var result = false;
  var theStr = new String(email);
  var index = theStr.indexOf("@");
  if (index > 0)
  {
    var pindex = theStr.indexOf(".",index);
    if ((pindex > index+1) && (theStr.length > pindex+1))
        result = true;
  }
  return result;
}

function validEmail(formField,fieldLabel,required)
{
        var result = true;

        if (required && !validRequired(formField,fieldLabel))
                result = false;

        if (result && ((formField.value.length < 3) || !isEmailAddr(formField.value)) )
        {
                alert("Please enter a valid/complete email address: userid@somedomain.com");
                formField.focus();
                result = false;
        }
	else
	{
	        formField.value = trimSpaces(formField.value);
	}

      return result;
}

function trimSpaces(s)
{
  // Remove leading spaces and carriage returns

  while ((s.substring(0,1) == ' ') || (s.substring(0,1) == '\n') || (s.substring(0,1) == '\r'))
  {
    s = s.substring(1,s.length);
  }

  // Remove trailing spaces and carriage returns
  while ((s.substring(s.length-1,s.length) == ' ') || 
	(s.substring(s.length-1,s.length) == '\n') || 
	(s.substring(s.length-1,s.length) == '\r'))
  {
    s = s.substring(0,s.length-1);
  }
  return s;
}