function insertName() {

  var name = 'D' + 'i' + 'rk ' + 'Eh' + 'ms';
  
  document.write(name);

}

function insertMailAdr(mailnam,mailsvr,maildom) {

  var adr = mailnam+'@'+mailsvr+'.'+maildom; 

  document.write('<a href="mailto:' + adr + '">' + adr + '</a>');

}