Radiobutton wont check anymore

I wonder if anybody can help me with this problem.

I have two radiobuttons (yes and no) and one textfield.

If I check the radiobutton-yes the textfield appears.

If I check the radiobutton-no I want the textfield to disappear and it should reset at the same time. That works fine.

But here the problem appears: when I click the radiobutton-no, the textfield-yes is being unchecked and the textfield disappears, only the radiobutton-no isnt checked and stays blank.

I use the following script:

if (this.rawValue=="1"){policy.presence="visible"}
else if (this.rawValue=="2"){policy.presence="hidden";
xfa.host.resetData("policy");

}