javascript - Submit form to another page (which is different from the page used in ACTION)

Question

I have a form like this:

index.php

<form method="post" action="send.php">
  <textarea name="msg" id="msg"></textarea>
  <input type="submit" value="Send" />
</form>

So, if I enter something in textarea and clicked on "Send", it is submitted to "send.php" page. But I want to include another button for previewing it. That is, when this button is clicked, the above form is submitted to "preview.php" which will be opened in a new blank window/tab (original page ie. index.php will be there intact). This is to display a preview of the message, that the user is going to send.

I do not know how to do this.

Answer 1

Use Javascript to temporarily change the action and target:

<form method="post" action="send.php" id="idOfForm">
  <textarea name="msg" id="msg"></textarea>
  <input type="submit" value="Send" />
</form>
<button onclick="doPreview();">Preview</button>
<script type="text/javascript">
    function doPreview()
    {
        form=document.getElementById('idOfForm');
        form.target='_blank';
        form.action='preview.php';
        form.submit();
        form.action='send.php';
        form.target='';
    }
</script>