in php javascript window.location.href not working on submit button?

Question

In PHP JavaScript window.location.href is not working on submit button. The problem is that function order() is not going on submit button. I have tried alert(''); message also.

I want when order button submitted, then form submits and user is redirected to login.php

<script type="text/javascript">
  function order() {
    var sStr1 = "login.php";
    window.location.href = sStr1;
    return false;
  }
</script>

<input type="submit" class="button4" name="order" id="order" value="Place Order" onclick="order()" >

Answer 1

Changing window.location does not submit a form. I'd rather type <form action="login.php" method="..."> and then Javascript is not necessary.