function generate_address( username, domain ) {
   var atsign = "@";
   var addr = username + atsign + domain;
   document.write(
      "<" + "a" + " " + "href=" + "mail" + "to:" + addr + ">");
   document.write("<img src=icon_pencil.gif ");
   document.write("border=0 width=20 height=18>");
   document.write("</a>")
}