function ValidateEmail(email)
{
  if(email.indexOf(" ")!=-1) return (false);
  var len=email.length;
  var at=email.indexOf("@");
  var tch=email.lastIndexOf(".");
  if((len>5) && (at==email.lastIndexOf("@")) && (tch>at+1) && (tch<len-2) && (at>0) && (at<len-1)) return (true);
    return (false);
}