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