function hide_a(){
    document.getElementById('login_layer').style.display = 'none';
    document.getElementById('fade').style.display = 'none';
}

function display_a(){
    document.getElementById('login_layer').style.display = 'block';
    document.getElementById('fade').style.display = 'block';
}

function $(id){
    return document.getElementById(id);
}

function toggle(id){
    var t = $(id);
    if (t != null) {
        t.className = t.className == "" ? "hidden" : "";
        
    }
}

function init(){
    cssdropdown.startchrome("chromemenu");
}

/*
 * Add to Browser's Favorite,仅支持opera9之前的opera版本。
 */
function bookmark(){
    var title = document.title
    var url = document.location.href
    if (window.sidebar) 
        window.sidebar.addPanel(title, url, "");
    else 
        if (window.opera && window.print) {
            var mbm = document.createElement('a');
            mbm.setAttribute('rel', 'sidebar');
            mbm.setAttribute('href', url);
            mbm.setAttribute('title', title);
            mbm.click();
        }
        else 
            if (document.all) 
                window.external.AddFavorite(url, title);
}