<script language='javascript'>

if (document.location.protocol=="http:" && 

{

//http redirect to https

var new_url = "https://" + document.location.hostname + document.location.pathname + document.location.search;

document.location = new_url;

}

或者（带有域名跳转）

<script language='javascript'>
if (document.location.protocol=="http:" && 
(document.location.hostname=='cd-sw.com' || document.location.hostname=='www.cd-sw.com')) {
//http redirect to https
var new_url = "https://" + document.location.hostname + document.location.pathname + document.location.search;
document.location = new_url;

}