Javascript - call() and apply()

In JavaScript 1.2 you could construct an object only within a single method. JavaScript 1.3 extends object construction to any number of methods.Object being built consecutively by two different methods is a real advantage.

The call() and apply() methods helps in multi-method object construction.

The apply() method lets you pass the parameters from one method to the other whereasthe call() method requires the full list of parameters.



outer = function(a){
this.player=a;

this.kick = function(){
alert('This is outer:'+this.player);
inner.call(this,this.player);
};
};

inner = function(b){
alert('This is inner:'+b);
ininner.apply(this,arguments);
};

ininner = function (c){
alert('This is inner of inner:'+c);
};
var outin=new outer('B');
outin.kick();




Output
This is outer:B
This is inner:B
This is inner of inner:B

Reference:

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http://www.webreference.com/js/column26/call.html