function addLoadEvent(func) {
    var oldonload = window.onload;
    if (typeof window.onload != 'function') {
        window.onload = func;
    } else {
        window.onload = function() {
            oldonload();
            func();
        }
    }
}

function toggleSitemap() {
    $("homefinder-sitemap-popup").toggleClassName("homefinder-show-sitemap");
    $("homefinder-sitemap-link").toggleClassName("homefinder-sitemap-close");
    $$("#homefinder-search-box select").each(function(i) {
        i.toggleClassName("hide-for-ie");
    });
    return false;
}

function prepareSitemapPopup() {
    var sitemapTrigger = $("homefinder-sitemap-link");
    var sitemap = $("homefinder-sitemap-popup");
    sitemapTrigger.onclick = function() {
        toggleSitemap();
        return false;
        };  
}

addLoadEvent(prepareSitemapPopup);