function HideMail( person, domainname, tld, displayname )
{

  if ( displayname=='' )
  {
  
    displayname=person+'@'+domainname+tld;
  
  }

  address=person+'@'+domainname+tld;

  with( document )
  {

  writeln("<a href='mailto:"+address+"'>"+displayname+"</a>");
  
  }

}