Erster ;D
<html>
<head>
<script>
function toggle() {
//alert("document.all(\"supertext\").style.visibility=" + document.all("supertext").style.visibility);
if (document.all("supertext").style.visibility == "hidden") {
document.all("supertext").style.visibility = "visible";
} else {
document.all("supertext").style.visibility = "hidden";
}
}
</script>
</head>
<body>
<h2>auf toggle link klicken. </h2>
<form>
<input name="name"><br>
<span id="supertext">
<input type="checkbox" name="telefon">Hast du Telefon<br>
<input type="checkbox" name="handy">Hast du Handy
</span>
</form>
<a href="javaScript:toggle()">toggle</a>
</body>
</head>
</html>