get the label for a radio

HTML

<label>
    <input type="radio" name="radio_1" value="h1">Hello test</label>
<label>
    <input type="radio" name="radio_1" value="h2">Hello Two</label>
<label>
    <input type="radio" name="radio_1" value="h3">Hello Three</label>

JavaScript

$("input:radio").click(function () {
    var label_description = this.parentElement.outerText;
    alert(label_description);
});