How to post to different form

<!DOCTYPE HTML>
<html>
<head>
<title>SO Example</title>
</head>
<body>
<form id="someForm" action="" method="POST">
<!--Put your inputs here -->
<input type="button" value="Save" name="save" onclick="askForSave()" />
<input type="button" value="Finished" name="finished" onclick="askForSubmit()" />
</form>
<script>
form=document.getElementById("someForm");
function askForSave() {
    form.action="save_for_later.php";
    form.action="http://box.sianware.com/echopost.php";
    form.submit();
}
function askForSubmit() {
    form.action="submit_for_approval.php";
    form.submit();
}

</script>
</body>
</html>