function contest_handle_filter(list) {
    var element, i;
    for (i = 0; i < list.length; i++) {
       element = document.getElementById('h' + list[i]);
       element.style.display = 'none';
       element = document.getElementById('s' + list[i]);
       element.style.width = '180' + 'px';
       element = document.getElementById('o' + list[i]);
       element.onchange = function () { if (this.selectedIndex != 0) this.form.submit(); }
    }
}