You could learn a couple of things just by looking the code of others. If you use jQuery you can see the source and find this kind of code in many places. Also:

You could learn a couple of things just by looking the code of others. If you use jQuery you can see the source and find this kind of code in many places. Also: var x = a || b || (function(){ /* stuff here */ })() or var a = b = b || {}