function A() {

    this.do1 = function () {

        console.log(1);

    };

    this.do2 = function () {

        console.log(2);

    };

}

var a = new A();

var keys = Object.keys(a);

for(var i=0;i<keys.length;i++){

    if(typeof a[keys[i]] ==="function"){

        a[keys[i].toUpperCase()] = a[keys[i]];

        delete a[keys[i]];

    }

}

a["DO1"](); //1