Find out if a radio button is disabled or not:
var x = document.getElementById("myRadio").disabled;
Click the button to find out if the radio button is disabled.
<!DOCTYPE html> <html> <body> Radio Button: <input type="radio" id="myRadio"> <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() {// w w w. jav a2 s . co m var x = document.getElementById("myRadio").disabled; document.getElementById("demo").innerHTML = x; } </script> </body> </html>