function checkEmailAddr() 
 {
  illegal = /[^\w._\-]/;
  email = document.newsletterForm.EmailAddr.value;

  if (email.length<6 || email.indexOf("@")==-1 || email.indexOf('.')==-1)
  { email=""; }
  else 
  {
   At = email.indexOf("@");
   Period = email.lastIndexOf('.');
   DNS1 = email.substring(0,At);
   if (DNS1.length<1 || DNS1.match(illegal)!=null) email="";
   DNS2 = email.substring(At+1,Period);
   if (DNS2.length<1 || DNS2.match(illegal)!=null) email="";
   DNS3 = email.substring(Period+1,email.length);
   if (DNS3.length<2 || DNS3.match(illegal)!=null) email="";
  }

  if (email.length==0) 
  {
   alert("The email address you have entered is invalid. Please re-enter a valid email address.\n");
   document.newsletterForm.EmailAddr.focus();
   return false;
  }
  
  return true;
 }