Save the last frame

1

I have the script below but I do not know how to get it done, please give a hand. It is on save last frame.

var my_so:SharedObject = SharedObject.getLocal(“kookie”);

mybtn.onPress=function(){if (my_so.data.user != undefined) { 
this.user = my_so.data.user; 
this.gotoAndStop(my_so.data.frame);}}

function rememberme() {
my_so.data.frame=this._currentframe;
my_so.data.user=“John”;
}