Bust.js

<script>
  function bust () {
    document.write = "";
    window.top.location = window.self.location;
    setTimeout(function() {
      document.body.innerHTML = '';
      }, 0);
    window.self.onload = function(evt) {
      document.body.innerHTML = '';
    };
  }
  if (window.top !== window.self) { // are you trying to put self in an iframe?
    try {
      if (window.top.location.host) { // this is illegal to access unless you share a non-spoofable document domain
        // fun times
      } else {
        bust(); // chrome executes this
      }
    } catch (ex) {
      bust(); // everyone executes this
    }
  }
  </script>