5 sets of radiobuttons and 1 textfield

I wonder and hope if somebody can help me with this question.
I have 5 sets of radiobuttons (yes, no) and one txtfield in which one can specify if in one of the sets a "yes" in chosen. When you open the form the txtfield is protected (initialize). I've tried this script as a change event in the radiobuttons: if (this.rawValue == 2) {Page1.textfield1.access= protected";
Page1.textfield1.rawValue=""}
else {Page1.textfield1.access="";Page1.textfield1.rawValue = "";}
The problem is that if the last set is a no (or the last two sets, three,or four) the textfield is protected. Can anybody help me to adjust my script or has another script in which the textfield stays accessable no matter where the "no's" are, if there is at least one "yes"?
Thanks.