closure.js

var name="Window";
var Top={
    name:"top",
    Inner:{
        name:"inner",
        getName:function(){
            var that=this;
            var i=0;
            function increase(){
                var rt="this binding:"+this.name+"\n\n"+"number i:"+i;
                i++;
                return rt;
            };
            i++;
            return increase;
        }
    }
};
var closure1=Top.Inner.getName();
alert("first call closure1"+"\n"+closure1());
var closure2=Top.Inner.getName();
var closure21=closure2;
alert("first call closure2"+"\n"+closure2());
alert("againe call closure1"+"\n"+closure1());
alert("againe call closure2"+"\n"+closure2());
alert("first call closure21"+"\n"+closure3());