<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
</head>
<body>
<script>
function launchProtocol(url) {
const iframe = document.createElement('iframe');
iframe.src = url;
document.body.appendChild(iframe);
}
launchProtocol('mailto:someone@example.com');
</script>
</body>
</html>