<form id=“zeitdiff-form”>

<label for="start">Startzeit (HH:MM):</label>
<input type="time" id="start" name="start">
<label for="ende">Endzeit (HH:MM):</label>
<input type="time" id="ende" name="ende">
<button type="button" onclick="berechneDifferenz()">Berechnen</button>

</form>
<div id=“ergebnis”></div>