Anyone have experience with the formToWizard.js plugin?

Anyone have experience with the formToWizard.js plugin?

I need a little advice on using this plug in. I was able to modify it to add and remove classes for the stepIndex "nav" with the buttons, now I have another issue. I need to add an onbeforeunload alert on steps 2-4 of a 5 step form. I am able to disable it for the submit but can't disable it for the first step, here's what I have: 

<script type="text/javascript">
 var action_is_post = false;
 $(document).ready(function () {
 //this disables it for submit 
        $("form").submit(function () {
 action_is_post === true;
 });
 //this should do it when step 0 is visible and has display block but doesn't 
 if ($("#step0").css("display") == "block") {
       action_is_post === true; 
 }
 window.onbeforeunload = function () {
       if (action_is_post === false) {
 return 'Using the browsers back, refresh or close button will cause you to lose all form data. Please use the Next and Back buttons on the form.';
 }
 }

});
</script>



















I know its not ideal to do this to the user's browser, but my boss feels it necessary. Any ideas? Should I insert the #step0 flag in the formToWizard.js itself somewhere? it doesn't work as it should this way.

thanks
Kane Leins