/* function */
//加入收藏
function addfavorite(surl, stitle) {
    try {
        window.external.addfavorite(surl, stitle);
    } catch (e) {
        try {
            window.sidebar.addpanel(stitle, surl, "");
        } catch (e) {
            alert("加入收藏失败，请使用ctrl+d进行添加");
        }
    }
}
function addfavoritethis() {
    addfavorite(document.title, document.href);
    return false;
}

//设为首页
function sethome(obj, vrl) {
    if (document.all) {
        obj.style.behavior = "url(#default#homepage)";
        obj.sethomepage(vrl);
    }
    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', vrl);
    }
}

function sethomethis() {
    sethome(document.body, window.location);
    return false;
}

//限制用户只输入数字  examle:  onkeypress="return typeonlydigital(event)"
function typeonlydigital(event) {
    var charcode = (typeof event.which == 'number') ? event.which : event.keycode;
}