gistfile1.txt

<script type="text/javascript" charset="utf-8"> 
 

nytint.history = {
 
  // The interval at which the window location is polled.
  URL_CHECK_INTERVAL : 500,
 
  // We need to use an iFrame to save history if we're in an old version of IE.
  USE_IFRAME : jQuery.browser.msie && jQuery.browser.version < 8,
 
  // The ordered list of history handlers matchers and callbacks.
  handlers : [],
  defaultCallback: null,
 
  // The current recorded window.location.hash.
  hash : window.location.hash,
 
  // Initialize history with an empty set of handlers.
  // Bind to the HTML5 'onhashchange' callback, if it exists. Otherwise,
  // start polling the window location.
  initialize : function() {
    _.bindAll(this, 'checkURL');
    if (this.USE_IFRAME) this.iframe = jQuery('<iframe src="javascript:0"/>').hide().appendTo('body')[0].contentWindow;
    if ('onhashchange' in window) {
      window.onhashchange = this.checkURL;
    } else {
      setInterval(this.checkURL, this.URL_CHECK_INTERVAL);
    }
  },
 
  // Register a history handler. Pass a regular expression that can be used to
  // match your URLs, and the callback to be invoked with the remainder of the
  // hash, when matched.
  register : function(matcher, callback) {
    this.handlers.push({matcher : matcher, callback : callback});
  },
 
  // Save a moment into browser history. Make sure you've registered a handler
  // for it. You're responsible for pre-escaping the URL fragment.
  save : function(hash) {
    window.location.hash = this.hash = (hash ? '#' + hash : "");
    if (this.USE_IFRAME && (this.hash != this.iframe.location.hash)) {
      this.iframe.document.open().close();
      this.iframe.location.hash = this.hash;
    }
  },
 
  // Check the current URL hash against the recorded one, firing callbacks.
  checkURL : function() {
    var current = (this.USE_IFRAME ? this.iframe : window).location.hash;
     if (!current ||
       current == this.hash ||
       '#' + current == this.hash ||
       current == decodeURIComponent(this.hash)) return false;
     if (this.USE_IFRAME) window.location.hash = current;
     this.loadURL(true);
  },
 
  // Load the history callback associated with the current page fragment. On
  // pages that support history, this method should be called at page load,
  // after all the history callbacks have been registered.
  // executeCallbacks must be passed as true, otherwise true/false will returned based on positive route matches.
  loadURL : function(executeCallbacks) {
    var hash = this.hash = window.location.hash;
 
    // go through matches in reverse order so that oldest rules are executed last
    for(var i = this.handlers.length-1; i >= 0; i--){
      var match = hash.match(this.handlers[i].matcher);
      if (match) {
        if(executeCallbacks === true){
          this.handlers[i].callback.apply(this.handlers[i].callback,match.slice(1,match.length));
        }
        return true;
      }
    }
    if(this.defaultCallback != null && executeCallbacks === true){
      this.defaultCallback();
    }else{
      return false;
    }
  }
 
};
 
$j(document).ready(function(){
  nytint.history.register(/city\/(.*)$/,window.showCity);        
  nytint.history.initialize()
  var didIload = (nytint.history.loadURL(true)) ? true : false ;  
  if(didIload === false){

//load the default city if there was no hash history
  }
});

//nytint.history.save('city/'+cityName)