gistfile1.js

/** 
 * a file that can be safely reloaded multiple times in the same page view,
 * allowing some stuff to run once and some stuff to run every time the 
 * page is loaded
 */
var myInitiallyFalseThing = false || myInitiallyFalseThing;

(function() {

  if (!myInitiallyFalseThing) {
    // do stuff that should only happen once 
    myInitiallyFalseThing = true;
  }

  // do other stuff

})();