function addFavorite() {//加入收藏
    var title = document.title;
    var url = "http://" + location.hostname;
    if (window.sidebar) {
        window.sidebar.addPanel(title, url, "");
    } else if (document.all) {
        window.external.AddFavorite(url, title);
    } else if (window.opera && window.print) {
        return true;
    }
}

function setHomePage() {//设为首页
    var url = "http://" + location.hostname;
    var obj = document.getElementsByTagName("a")[0];
    try {
        obj.style.behavior = 'url(#default#homepage)';
        obj.setHomePage(url);
    } catch (e) {
        alert("浏览器不支持");
    }
}

function checkall(obj) {
    var chs = obj.form.getElementsByTagName("input");
    for (var i = 0; i < chs.length; i++) {
        chs[i].checked = obj.checked;
    }
}