Checkbox query! Javascript to prevent unchecking...

[lucy_36]

Hi, 

I'm new to adobe acrobat interactive PDFs but there are so many helpful posts here that have got me a long way! I currently have a number of checkboxes for different courses (eg. Course1, Course2) which check proficiencies in a list:

- Course1 checkbox: ticks proficiencies M1.1, M1.2, M1.4

- Course2 checkbox: ticks proficiencies M1.1, M1.6, M1.7

Currently if someone unchecks Course1, this will uncheck box 1.1 even if Course2 is still checked. Is there a way to prevent this?

I'm just using this code in Course1 checkbox on MouseUp:

this.getField("M1.1").value = event.target.value;
this.getField("M1.2").value = event.target.value;
this.getField("M1.4").value = event.target.value;

And this code in Course2 checkbox on MouseUp:

this.getField("M1.1").value = event.target.value;
this.getField("M1.6").value = event.target.value;
this.getField("M1.7").value = event.target.value;

Thanks in advance!

Lucy

[Nesa Nurani]

There are couple of ways you can achieve this, here is one:
Remove all Mouse UP scripts and place this in one (any) text field as custom calculation script:

var c1 = this.getField("Course1").valueAsString;
var c2 = this.getField("Course2").valueAsString;
this.getField("M1.1").checkThisBox(0,(c1 !== "Off" || c2 !== "Off")? true : false);
this.getField("M1.2").checkThisBox(0,(c1 !== "Off")? true : false);
this.getField("M1.4").checkThisBox(0,(c1 !== "Off")? true : false);
this.getField("M1.6").checkThisBox(0,(c2 !== "Off")? true : false);
this.getField("M1.7").checkThisBox(0,(c2 !== "Off")? true : false);

[Thom Parker]

So, you want the "Course" checkboxes to only turn other checkboxes On, but never Off. 

There are many ways to do this. Nesa suggested a universal calculation script. 

Here is another method

Mouseup for Course 1

if(event.target.value != "Off"){

    this.getField("M1.1").value ="Yes";
    this.getField("M1.2").value = "Yes";
    this.getField("M1.4").value ="Yes";

}