<html>
<head>
<title>Page that displays an form whose action URL redirects to http</title>
<script>
function submitForm() {
form = document.getElementById("insecureForm");
form.submit();
}
</script>
</head>
<body>
This page contains an form which targets URL that redirects to http,
causing insecure content (when this page is loaded over https).<br>
<form id="insecureForm" action="/redirect_to_http" method="get">
<input type="submit" />
</form>
</body>
</html>