add favorite & 收藏夹

add favorite

// 收藏夹

function favorite (){
    var ctrl = (navigator.userAgent.toLowerCase()).indexOf("mac") !== -1 ? "Command/Cmd" : "Ctrl";
    if (document.all){
        window.external.addFavorite("https://www.xgqfrms.xyz", "");
    } else if (window.sidebar){
        window.sidebar.addPanel("官网", "https://www.xgqfrms.xyz", "");
    } else {
        alert("您可以通过快捷键" + ctrl + " + D 加入到收藏夹");
    }
}