window.addEvent("domready", function() {
    if ($('left_form'))
    {
        var form_button = $('left_form').getElementsByTagName('button')[0];
        form_button.parentNode.removeChild(form_button);
        var form_select = $('left_form').getElementsByTagName('select')[0];
        form_select.onchange = function() {$('left_form').submit()};
    }
});