head안에 추가해 주시면 도메인에 www를 강제로 삽입해줍니다.

  <script language="Javascript" type="text/javascript">
  <!--
  var host = location.host.toLowerCase();
  var currentAddress = location.href;
  if (host.indexOf("www")== -1)
  {
  currentAddress = currentAddress.replace("//","//www.");
  location.href = currentAddress;
  }
  //-->
  </script>

http 일반 홈페이지 강제 https로 접속하기

  <script language="Javascript" type="text/javascript">
  <!--
  var host = location.host.toLowerCase();
  var currentAddress = location.href;
  if (host.indexOf("www")== -1)
  {
  currentAddress = currentAddress.replace("//http","//https.");
  location.href = currentAddress;
  }
  //-->
  </script>