SO - 4606300

by Arun P Johny

HTML

<input type=radio name="vote_x" value="5" id="vote_x">
    <label for="vote_x">blabla</label><br>

JavaScript

var el = document.getElementById("vote_x");
while(el.nextSibling && !(/label/i.test(el.nextSibling.tagName))){
    el = el.nextSibling;
}
var text = el.nextSibling.innerHTML
alert(text)