How to reference a Sprite with a String

programming flash
1

I cant get the this[] keyword to work.

I want to send a string to a function and then, via the string reference a Sprite. Are theire any other ways to adress a sprite with a String value?

I thought this[myString].alpha = 0.5; was gonna do the trick but i keep getting (1010: A term is undefined and has no properties.). I tried every possible solution it feels like. Delaring Strings locally and Global…but i can´t get it to work. And the String is well spelled btw!

//Nothing Works
this["myString"].alpha = 0.5;
this[myString].alpha = 0.5;


//Anyway to reference a Sprite with a String???

Anyone…???