(function() {
    // setup shortcuts
    var yuiDom = YAHOO.util.Dom;
    var yuiEvent = YAHOO.util.Event;
    var Url = SW.tools.Url;
    
    // main function which reloads the search results page
    function doRefresh() {
        var url = Url.setParameter(document.location.href, "resultsPerPage", yuiDom.get("resultsPerPageInput").value);
        url = Url.setParameter(url, "sortOrder", yuiDom.get("sortOrderInput").value);
        url = Url.setParameter(url, "page");
        document.location.href = url;
    }
    // on page load, added listeners
    yuiEvent.onDOMReady(function() {
        // handlers for drop-downs at top of results
        yuiEvent.addListener("resultsPerPageInput", "change", doRefresh);
        yuiEvent.addListener("sortOrderInput", "change", doRefresh);
    });
})();