var TralhaController = {
  thread : null,
  observers : [],
  addObserver:function() {
var obj = this.observerByArguments(arguments);
    this.observers.push( obj );
    if (this.urlAtual != undefined ) {
        obj.update(this.urlAtual);
    }
    this._init();
  },
  observerByArguments:function(args) {
obj = {};
if( args.length == 1 ) {
obj.observer = args[0];
obj.update = function(url) {
this.observer.update(url);
}
} else if( args.length == 2 ) {
obj.regex = args[0];
obj.observer = args[1];
obj.update = function(url) {
if( (new RegExp(this.regex)).exec(url) ) {
this.observer.update(url);
}
}
}
if( !obj.observer.update ) {
throw "Observer must implements update(url) funtion";
}
return obj;
  },
  _init:function() {
    if(!this.thread) {
      thread = setInterval( function() { TralhaController._check(); }, 400 );
    }
  },
  _check:function() {
    if( this.urlAtual != document.location.href ) {
      this.urlAtual = document.location.href;
      this._notify();
    }
  },
  _notify:function() {
    for(i=0;i<this.observers.length;i++) {
      if (this.urlAtual) {
         this.observers[i].update( this.urlAtual );
      }
    }
  }
}

/*
var observadorBusca = { 
	update:function(url) {  
		if( url.indexOf("#busca=")!=-1 ) {    //Executa a busca  
}} 
};
var observadorLink = { update:function(url) {  if( url.indexOf("#link=")!=-1 ) {    //Executa o link clicado  
}} };
TralhaController.addObserver(observadorBusca);
TralhaController.addObserver(observadorLink);
*/