radio button click
HTML
<input type="radio" name="gender" value="male"> Male<br>
<input type="radio" name="gender" value="female"> Female<br>
<input type="radio" name="gender" value="other"> Other
JavaScript
$(document).ready(function() {
$(" input:radio").click(function() {
alert($(this).val());
});
//$("radio:first").prop("checked", true).trigger("click");
});