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<!DOCTYPE html> <html> <body> <input type="radio" name="colors" value="red" id="myRadio">Red color <p>Click the buttons below to display and/or change the value of the value attribute of the radio button.</p> <button onclick="display()">Display name</button> <button onclick="change()">Change name</button> <script> function display() { var x = document.getElementById("myRadio").value; alert("The value of the radio button is: " + x); } function change() { var x = document.getElementById("myRadio").value = "newRadioBtnValue"; alert ("The value was changed to: " + x); } </script> </body> </html>