<!DOCTYPE html>
<html>
<head>
<title>Auto Submit Form Demo</title>
</head>
<body>
<form id="autoSubmitForm" action="javascript:void(0);">
<input type="hidden" name="data" value="Automatic Submission">
</form>
<script>
function submitFormAutomatically() {
document.getElementById('autoSubmitForm').submit();
alert("Form submitted with data: " + document.getElementById('autoSubmitForm').data.value);
}
window.onload = submitFormAutomatically; // Call the function when the page loads
</script>
</body>
</html>