js/ajax POST without submit
===

I want to preface this with, "I'm a total noob so please explain like I'm five."  I've looked at a lot of answers to this common question but I was unable to find a suitable answer to my particular problem.  Below is the scripty bit in question.  Currently, the user inputs an order number.  This gets sent via the ajax call to a php processor script.  The processor script validates the order number and then sends data back.  If data !="NO" we get sent to a new page.

    <script type="text/javascript">
    function resetTextFields()
    {
        $("#orderNum").val("");                
    }

    function onSuccess(data, status)
    {
        resetTextFields();
        // Notify the user the new post was saved
        $("#message").fadeIn(2000);
        data = $.trim(data);
        if(data != "NO")
        {
            location.href="labOrders.php";
        }
        else
        {
            $("#message").css("background-color", "#ff0000");
            $("#message").text("Not a valid order number...");
        }
        $("#message").fadeOut(2500);
    }

    $(document).ready(function() {
        $("#submitSearch").click(function(e){
 
            var formData = $("#labOrderFind").serialize();
 
            $.ajax({
                type: "POST",
                url: "labSearch.php",
                cache: false,
                data: formData,
                success: onSuccess
            });
 
            e.preventDefault();
        });
    
    
    });
</script>

What I would like to do is onSuccess if data!="NO", POST the formData again to the labOrders.php so that labOrders.php can use it to do more lookups against a db.  I've tried to do this many ways but I've not been successful.  Am I going about this the wrong way?  As long as we can use POST, I'm open to all solutions.

Extra info:
jquery and jquery.mobile are loaded in the head (it's a tablet app).

Maybe stackoverflow needs a noob tag for questions like this.