HTML Form With Differing Actions Depending On Button Pressed?

I have a form, and i want two alternative submit links done as <a> links.Essentially, one will 'save changes' and remain on the same page, the other will 'save and preview' the final content.I've been playing for a while and can't seem to get it to workIf i just use one button and set the form action as normal all works fine.I'm told that i can set the form action within a javascript function and submit the form from there, but the problem is that clicking the link now just goes to the 'href' on the save button without submitting the form. (I believe the href is still required to make a working link).My code is as follows (ive simplified it to the essential components being used, theres also some php bits in the action being set) :

Code:
<script type="text/javascript">
function docSave()

[code].....