You need to select at least one radio button / checkbox

Question

What would be the JavaScript code to check if the user has selected at least one radio button, knowing that the radio buttons all have the same "name" attribute?

Same question for checkboxes.

I do not use any fancy javascript frameworks such as JQuery and others ...

Answer 1

function IsARadioButtonChecked ( radiogroup ) {
    for (var i = 0; i < radiogroup.length; i++) {
        if (radiogroup[i].checked) {
            return true;
        }
    }
    return false;
}

if (IsARadioButtonChecked(document.forms.myForm.elements.myRadioGroupName)) {
    // …
}