note js 2

gistfile1.txt

var QwikObject = function (id, x, y, z) {
  this._x = x || 0;
};

QwikObject.prototype = {
    get x(){
        return this._x;
    },
    set x(x){
        this._x = x;
    }
};

QwikObject.prototype.left = function() { return this._x + 'px'; }

obj = new QwikObject(null, 5);
obj.left();