function emailwriter(contact, email, host, subject) { 
  document.write('<a href="' + 'mail' + 'to:' + email + '@' + host + '?subject=' + subject + '">' + contact + '</a>');
}

function convertcurrency(v) {
 return window.open ("http://www.x-rates.com/cgi-bin/cgicalc.cgi?base=NZD&value=" + v,"displayWindow2","toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,width=535,height=630"); 
}