function go(url) {
    window.location = url;
}

function percentage(num, total) {
    return (Math.round(num / total * 10000) / 100.00 + "%");// 小数点后两位百分比
}

function new_captcha(cls) {

    cls = cls || 'captcha';
    var captcha_src = $('#' + cls).attr('src');
    $('#' + cls).attr('src', captcha_src + '?time=' + new Date().getTime());
}

function set_home_page() {
    if (document.all) {
        document.body.style.behavior = 'url(#default#homepage)';
        document.body.setHomePage(window.location.href);
    } else if (window.sidebar) {
        if (window.netscape) {
            try {
                netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
            } catch (e) {
                alert("该操作被浏览器拒绝，如果想启用该功能，请在地址栏内输入 about:config,然后将项 signed.applets.codebase_principal_support 值该为true");
            }
        }
        var prefs = Components.classes['@mozilla.org/preferences-service;1'].getService(Components.interfaces.nsIPrefBranch);
        prefs.setCharPref('browser.startup.homepage', window.location.href);
    } else {
        alert('您的浏览器不支持自动自动设置首页, 请使用浏览器菜单手动设置!');
    }
}

function add_favorite() {
    if (document.all) {
        try {
            window.external.addFavorite(window.location.href, document.title);
        } catch (e) {
            alert("加入收藏失败，请使用Ctrl+D进行添加");
        }

    } else if (window.sidebar) {
        window.sidebar.addPanel(document.title, window.location.href, "");
    } else {
        alert("加入收藏失败，请使用Ctrl+D进行添加");
    }
}

function to_desktop() {
    try {
        var WshShell = new ActiveXObject("WScript.Shell");
        var oUrlLink = WshShell.CreateShortcut(WshShell.SpecialFolders("Desktop") + "\\" + document.title + ".url");
        oUrlLink.TargetPath = window.location.href;
        oUrlLink.Save();
    } catch (e) {
        alert("当前IE安全级别不允许操作！");
    }
}