function toggleVisibility(id, type) {
    var type = (navigator.userAgent.indexOf('MSIE 7') + navigator.userAgent.indexOf('MSIE 6')) > 0 ? 'block' : type;
    document.getElementById(id).style.display = document.getElementById(id).style.display == 'none' ? type : 'none';
    document.getElementById(id + '_link').className = document.getElementById(id).style.display == 'none' ? 'files_right' : 'down';
}

addEvent(window, 'load', my_onload, false);
//window.onload = onload();

function my_onload() {
    var elements = document.getElementsBySelector('.hidden');
    for (var i = 0; i < elements.length; i++) {
        elements[i].style.display = 'none';
        document.getElementById(elements[i].id + '_link').className = 'files_right';
    }
}