javascript - Disable Radio Button once selected? -

i have 2 radio buttons on current page , need disable 1 selected cannot selected second time. can add before break disable button.

switch(view.getid()){             case r.id.radiobutton:                 if(checked)                     txt.settext(kmtom(dist));                  break;             case r.id.radiobutton2:                 if(checked)                     txt.settext(mtok(dist));                 break;         } 

add

$(your_radio).attr("disabled","disabled");