function generate_address( username, linktext ) {
  var domain = "mimsandsmith.com";
  var atsign = "@";
  var addr = username + atsign + domain;
  if (!linktext)
     linktext=addr;
  document.write("<" + "a" + " " + "href=" + "mail" + "to:" + addr + ">" + linktext + "<\/a>");
}