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(function (w) {
  'use strict';
  
  w.location.hash = "no-back-button";
  w.location.hash = "Again-No-back-button";//again because google chrome don't insert first hash into history
  w.onhashchange = function(){
    w.location.hash = "no-back-button";
  }
  
  
})(window);

//Original: http://stackoverflow.com/a/20896928