function checkNewsletterEmail()
{
  if (document.newsletter.address.value.length < 1)
          {
            alert("Please enter an Email address.");
            return false;
          }
	     
          if ((document.newsletter.address.value.indexOf("@") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
           return false;
          }
    
          if ((document.newsletter.address.value.indexOf(".") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
           return false;
          }
       
// default (ok)
	return true;
}

function checkRecommendEmail()
{
  if (document.recommend.towho.value.length < 1)
          {
            alert("Please enter an Email address.");
            return false;
          }
	     
          if ((document.recommend.towho.value.indexOf("@") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
           return false;
          }
    
          if ((document.recommend.towho.value.indexOf(".") == -1))
          {
           alert("Please enter a valid Email address, that contains an '@' and a '.'");
           return false;
          }
       
// default (ok)
	return true;
}