window.onload = init_sort;

function init_sort()
{
    sort();
    $('product_filterby').onchange = sort;
    $('product_sortby').onchange = sort;
}

function sort()
{
    new Ajax.Updater('sort_target','/allsermons_remote.php',
                     {
                        method: 'get',
                        parameters: 'product_filterby=' + escape($('product_filterby').value) +
                                    '&product_sortby=' + escape($('product_sortby').value),
                        onLoading: function(transport)
                                    {
                                        $('sort_target').innerHTML = '<p style="text-align:center; font-weight:bold;">Loading...</p>';
                                    }
                     });
}