Validation to check if a radio button is checked or not through javascript

Question

I want to just check whether a radio button is selected or not through javascript. I am getting an object is undefined error with the below code.

function ValidateRadioButton() {
  if (document.form1.optfirst.checked == true)
  {
    alert("Option1 is checked");
  } else if (document.form1.optsecond.checked == true) {
    alert("Option2 is checked");
  }
  return false;
}

And on button click OnClientClick="return ValidateRadioButton();" — user3074125, Dec 19 '14 at 13:20
Note that *checked* returns a boolean, so `if (document.form1.optfirst.checked)` is sufficient. — RobG, Dec 19 '14 at 13:31

score 0 · Answer 1 · answered Dec 19 '14 at 13:22

0

You should get your Radio button through ID

IF(document.getElementById("optfirst").checked)
{
  //Code To Execute
}

answered Dec 19 '14 at 13:22

Kaushal Khamar

2,097
1
17
23

1

If the radio and the form have name attributes, how he is doing it is fine. – James Hibbard Dec 19 '14 at 13:26

Validation to check if a radio button is checked or not through javascript

1 Answers1