function changeSearchTab(el) {
    var tabs = $('search-tabs').getElementsByTagName('a');
    for(var i = 0; i < tabs.length; i++) {
        if(tabs[i].id != el.id)
            replaceClassName(tabs[i], "on", "off");
    }
    replaceClassName(el, "off", "on");
    var method = el.id.replace(/^tab-/, "");
    $('style').value = method;

    if($('q').value) {
        $('search-form').submit();
    }
}