script.js

function getRedirectPageUrl() {
  var url = location.hash.substring(1);
  console.log(url);
  try {
    if(url.length === 0) return "/";
    url = decodeURIComponent(url);
    if(!url.match(/^https?:\/\//)) return "/";
  } catch(e) {
    console.log("invalid url");
  }
  return url;
}

/* ... */

var url = getRedirectPageUrl();
console.log(url);
location.href = url;