How to make check box to disable several text boxes and otherwise

[Anna25874806c7b1]

Hi everyone. In my form I need all the text boxes ("choice 6' "choice 7" "choice 8" and "choice 9") to be deactivated if the check box ("no excursion") is on. So all the text boxes become empty and readonly. And if you uncheck the check box, they should become available again. 

And othervise, if you type anything in any of the text boxes, the check box becomes unavailable. 

[Nesa Nurani]

1. You wrote that your fields are named "no excursion", Choice 6,7,8,9 in your photo fields are named "No excursion 2" and choices 7,8,9,10?

2. I don't get your explanation, if checkbox is checked text fields become read only and empty but if any field have text checkbox is unavailable? That doesn't make sense, why setting script in checkbox to empty fields if they have value checkbox can't be checked?

[Anna25874806c7b1]

Sorry for confusing) I sent the screenshot from the copy of the file. Will try to explain what I mean) there should be only two options for people filling the form: either they are filling the text boxes (choice 7,8,9,10), or they switch on the check box (No excursion 2). So if any of the text boxes are filled, the check box becomes unavailable and otherwise. Hope I didn't make it very confusing. 

[Nesa Nurani · Accepted solution]

In one of text fields as 'Custom calculation script' use this:

var c7 = this.getField("Choice 7");
var c8 = this.getField("Choice 8");
var c9 = this.getField("Choice 9");
var c10 = this.getField("Choice 10");
var chk = this.getField("No excursion 2");
c7.readonly = chk.valueAsString == "Off" ? false : true;
c8.readonly = chk.valueAsString == "Off" ? false : true;
c9.readonly = chk.valueAsString == "Off" ? false : true;
c10.readonly = chk.valueAsString == "Off" ? false : true;
chk.readonly = (c7.value||c8.value||c9.value||c10.value) ? true : false;

[Anna25874806c7b1]

OMG! It works! Thank you very much))