url_encode-decode test

<!DOCTYPE html>
<html lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

<script type="text/javascript">

function test() {
    document.forms.form.str.value = encodeURI(document.forms.form.str.value);
    alert(document.forms.form.str.value);
    return true;
}
</script>
</head>
<body>

<?php
if (!empty($_POST)) {
    var_export($_POST);
    echo '<br/> decoded = ';
    echo urldecode($_POST['str']);
}
?>

<form action="" name="form" method="post" onsubmit="test()">
<input type="text" name="str" value="Фамилия, Имя skúška ståle">
<input type="submit" name="send" value="Send">
</form>

</body>
</html>