Esempio DOM

<!DOCTYPE html>
<html>
<head>
    <title></title>
</head>
<body>
<div id='inserisci'>
    <p> Motori di ricerca:
           <a href="www.google.com">Google</a>,
           <a href="www.duckduckgo.com>Duck Duck Go</a>,
           <a href="www.bing.com">Bing</a>
   </p>
</div>
<script>
    var links = document.getElementsByTagName("a");
    links[0].parentNode.style.color="red";
    links[0].setAttribute('disabled',true);
    links[0].setAttribute('href','www.fakegoogle.com');
    var x = document.createElement('hr');
    document.getElementById('inserisci').appendChild(x);
</script>
</body>
</html>