[flasheroff]

готовый вариант:

var myButton = Wrap.attachMovie("button", "button_mc"+i, i);
myButton.onRelease = function () {
	myButton._visible = false;
  	my_so.data["myTextSaved"+i] = "test";
 	my_so.flush();
}
 
var my_so = SharedObject.getLocal("savedText", "/");
if(my_so.data["myTextSaved"+i] == "test"){
	myButton._visible = false;
}