var mainDomain="activetechnology.co.uk";
function drawEmail(alias,text,dn,title) {
  var at = '@'; // at symbol encoded
  var p1 = 'mail'; // protocol name encoded part 1
  var p2 = 'to:'; // protocol name encoded part 2
  if (!dn) dn=mainDomain;
  if (title) title=' title="'+title+'"'
    else title='';
  if (!text) text=alias+at+dn;
  document.write('<a href="'+p1+p2+alias+at+dn+'"'+title+'>'+text+'</a>');
}