With jQuery Test

by yasumodev

HTML

<script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
<input type="checkbox" id="chk_1">AAA

<input type="radio" name="radA" id="rad_1" value="1" xyz="x">1
<input type="radio" name="radA" id="rad_2" value="2" xyz="y">2
<input type="radio" name="radA" id="rad_3" value="3" xyz="z">3
<hr>
<select id="sel">
  <option value="1" xyz="x">a</option>
  <option value="2" xyz="y" selected>b</option>
</select>

JavaScript

alert($("#rad_1").val());
alert($("#rad_1:checked").val());
return;

alert($("#sel > :selected").val());
alert($("#sel > :selected").attr("xyz"));
$("#sel > [xyz=x]").prop("selected", true);
return;

$("#chk_1").prop("checked", true);

$("#rad_1").prop("checked", true);
//$("[name=radA]").val("2");
//alert($("[name=radA]").val());

//alert($("[xyz=y]").val());