Sending javascript array to php

I am trying to send a javascript array to a php for validation.  Here is my code:

var elements = new Array();
        var values = new Array();
        var count = 0;
        var i = 0;
        $("input").each(function(){
            i++;
            var ID = $(this).attr("id");
            elements = ID;
            count = count+1;
        });
        count = 0;
        i = 0;
        $("input").each(function(){
            // Assign each slot to i's form element
            i++;
            var value = $(this).attr("value");
            values = value;
            count = count+1;
        });

$.ajax({ url: 'process.php',
                data: { submit : "1", elements : elements, values : values },

on process.php:

$values=json_decode($_POST['values']);
$elements = json_decode( $_POST["elements"] );

But when these values are echoed out, they come out to be empty.