function Car(){return this;}
Car.prototype.wheels = 4;
Car.prototype.startEngine = function(){ console.log('starting engine....'); return this;};
Car.prototype.speedUp = function(){ console.log('speeding up...'); return this;};


Notice that the constructor function and the startEngine and speeeUp methods return ‘this object’, which refered to the objects that we’ll create;
Now, that we’ve created our car constructor function, with wheels property and startEngine and speedUp methods, lets create a new car and invoke their methods in a chainable jquery like fashion:


car1 = new Car;

car1.startEngine().speedUp()
starting engine....
speeding up...


We can add more methods to our car object and they will be chainable too..

Car.prototype.brake = function(){console.log('car is braking...')};

car1.startEngine().speedUp().brake()
starting engine....
speeding up...
car is braking.


Thalt’s all folks, make your methods return the ‘this’ object and save some key strokes is your scripts…

phone-apps

Developing native mobile applications today using HTML and Javascript is easier than ever thanks to some frameworks that allow you to develop mobile applications using  your hard gained web skills, that is, you dont hat to learn objetive-C, Java or C++ to create applications for the apple Iphone or the google Android OS, just HTML, CSS and Javascript. These frameworks allows you to develop real native mobile apps, that is, your apps can have access to the accelerometer and camera on the phones.  Here is a short list of cross-platform mobile development frameworks that you can you to create your native mobile apps for different mobile platforms:

- Titanium Platform: This frameworks is one of the best for developing beautifull native apps for the iphone and android os.

- PhoneGap:  This framework covers the full range of mobile devices, that is the iphone, android devices, blackberry,  palm webOS and Symbian.

- AppMobi: This framework is based on PhoneGap, and the special thing about it is that you can develop iphone and ipad apps without the need of MAC OS, any PC with Windows or Linux can do the job.

You can see a complete list of mobile application development frameworks here, although some of them may not be based on html and javascript.

a) Mozilla Developer Network: This website has  one of the most comprehensive javascript guide on the internet and also develops great tools for js developers like the mozilla firebug.

b) Yahoo Developer Center: This website has many resources and APIs for javascript developers, like the Yahoo User Interface Library.

c) Douglas Crockford is a javascript guru who writes really good topics about the language on his website. He is also the creator of json(a data interchange format similar to xml, but much better) and jsLint, which is a code quality tool.

d) W3schools is a great website not only for javascript, but also for web development. It has a complete set of guides, tutorials, examples and language references.  Its a good resource for web developers.

e) JFConf is a website for a javascript conference that takes places annually. The conference speakers are among the best javascript hackers and developers in the world. The website features all the videos of previous presentations of the conference.

Well thats´all folks for this post until next time with another episode of javascript…