<html>
<head>
<script>
function submitForm()
{
document.getElementById('submit').click();
}
</script>
</head>
<body>
<?
IF ($_POST['textdata'] == "foo") {
ECHO "You should not be seeing this text!";
}
?>
<form method="POST">
<input type="text" name="textdata" value="foo">
<input type="submit" id="submit">
</form>
</body>
</html>