I tried to write such a check (the code below), and I stopped there. If it turned out to withdraw at least alerts, then I would have figured it out further.
if ($('form-radios input').checked) { alert(1); } else { alert(0); } label.option.art-radiobutton.art-checked:after { content: ""; display: block; position: absolute; width: 15px; background: red; height: 15px; top: 0; left: -10px; } label.option.art-radiobutton { position: relative; } <div id="edit-attributes-field-tirag--12" class="form-radios"> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-695--12"> <input type="radio" id="edit-attributes-field-tirag-695--12" name="attributes[field_tirag]" value="695" class="form-radio ajax-processed">1000</label> </div> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-700--12"> <input type="radio" id="edit-attributes-field-tirag-700--12" name="attributes[field_tirag]" value="700" checked="checked" class="form-radio ajax-processed">10000</label> </div> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-696--12"> <input type="radio" id="edit-attributes-field-tirag-696--12" name="attributes[field_tirag]" value="696" class="form-radio ajax-processed">2000</label> </div> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-697--12"> <input type="radio" id="edit-attributes-field-tirag-697--12" name="attributes[field_tirag]" value="697" class="form-radio ajax-processed">3000</label> </div> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-698--12"> <input type="radio" id="edit-attributes-field-tirag-698--12" name="attributes[field_tirag]" value="698" class="form-radio ajax-processed">4000</label> </div> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-693--12"> <input type="radio" id="edit-attributes-field-tirag-693--12" name="attributes[field_tirag]" value="693" class="form-radio ajax-processed">500</label> </div> <div class="form-item form-type-radio form-item-attributes-field-tirag"> <label class="option art-radiobutton" for="edit-attributes-field-tirag-699--12"> <input type="radio" id="edit-attributes-field-tirag-699--12" name="attributes[field_tirag]" value="699" class="form-radio ajax-processed">5000</label> </div> </div>