javascript_pupil,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<script>
document.addEventListener("DOMContentLoaded", function() {
let select = document.querySelector("[name='name']"),
textarea = document.querySelector("[name='results']"),
obj = {
one: 11111,
two: 22222,
three: 33333
};
const load = () => textarea.value = obj[select.value];
select.addEventListener("change", load);
load();
})
</script>
</head>
<body>
<select name="name">
<option value="one">one</option>
<option value="two" selected>two</option>
<option value="three">three</option>
</select>
<textarea name="results">
one
11111
two
22222
three
33333
</textarea>
</body>
</html>