Hiding fields based on entered value

Hi!

I want to hide two fields based on information user has entered with if script. this is my case:

if (session.findById("wnd[0]/usr/ctxtRF02K-KTOKK").text === "1010" || "1020" || "1030") {

  session.findById("wnd[0]/usr/lblRF02K-EKORG").hide();

  session.findById("wnd[0]/usr/ctxtRF02K-EKORG").hide();

  session.findById("wnd[0]/usr/lblRF02K-LIFNR").hide();

  session.findById("wnd[0]/usr/ctxtRF02K-LIFNR").hide();

};

tried also with else if statement entering field values one by one, But the result of this is that the fields are hidden independently of the value entered in the KTOKK text field.

Any ideas?