var reEmail = /^.+\@.+\..+$/
var sEmail = "Email"
var iEmail = "This field must be a valid email address (like foo@bar.com). Please reenter it now."
var pEmail = "valid email address (like foo@bar.com)."
function isEmail (s)

{   if (isEmpty(s)) 
       if (isEmail.arguments.length == 1) return defaultEmptyOK;
       else return (isEmail.arguments[1] == true);
    
    else {
       return reEmail.test(s)
    }
}
function checkEmail (theField, emptyOK)
{   if (checkEmail.arguments.length == 1) emptyOK = defaultEmptyOK;
    if ((emptyOK == true) && (isWhitespace(theField.value)))
	{
		 theField.value = ""
		 return true;
	}
    else if (!isEmail(theField.value, false)) 
       return warnInvalid (theField, iEmail);
    else return true;
}