assigning default value to radio button that further could be changed

Hi there,

I'm having a dropdown (CN) where client chose one of the options from A to G. Depending on this choice, some of my fields are brought from readonly true, to readonly false (this is done by doc level function EnableFrom... and DisableForm...) .

So for example when B, C and G are chosen in dropdown, radio button ( field P6RB01) can be filled.

Now I want to set a default value of this radio button to "No", when "G" is selected. Here comes the script  placed on  a hidden field in "Calculate" tab that triggers radio button:

// target amount status toggle

var CN = getField("CN1")

if ((CN.value == "B") ||

(CN.value == "C") ||

(CN.value == "G")) {

EnableFormFieldFromGray("P6RB01")

}else{

DisableFormFieldToGray("P6RB01")

this.getField("P6RB01").value = "Off";

}

//set value of RB to "no" if G chosen

if(CN.value == "G") {

    this.getField("P6RB01").value = "No";

}

Value is set to "No", but the idea is that the user can change this default value afterwards. Now this script is still reverting to "No", even if "Yes" is chosen later. Unfortunately defaultValue property doesn't work - apparently it works only when the form is reset.

I tried also placing it on dropdown field itself,  but it is not reliable, as triggers really doesn't work good...

Any ideas?

Thanks!!