/**
 * Install a search engine (opensearch)
 * Returns false in case of success (sic!) because that will keep the file link
 * from being followed.
 */

function addEngine(engineURL) {
    if (window.external && ("AddSearchProvider" in window.external)) {
        window.external.AddSearchProvider(engineURL);
        return false;
    } else {
        alert(error_opensearch_unsupported);
        return true;
    }
}

function add_tag(tag_id){
        var unused=$('#unused_'+tag_id);
        $(unused).hide(600);
        $('<a href="#" onclick="del_tag('+tag_id+',this)" class="used_tag" style="display:none;"></a>').html('<input type="hidden" name="set_tags[]" value="'+tag_id+'">'+$(unused).text()).appendTo('#item_tags').show(600);
}

function del_tag(tag_id,el){
        var unused=$('#unused_'+tag_id);
        $(unused).show(600);
        $(el).hide(600).remove();
}