Can I enable a javascript from another JavaScript?

I am making a game where there is a computer system. In the system there is 2 input fields. I don’t want the player to be able to type into one input field prematurely so I want the input fields alpha to be 0. I already have a script that can make it fade, but i don’t want the fade script to activate until the first input field is filled in. The Javascripts are applied to each input field. The script type is Javascript.79251-screen-shot-2016-09-29-at-82610-pm.png

Just set intractable to false and when the user type anything set it back to true