document.onkeydown = function(eventTag) {
    var event = eventTag || window.event;
    var e = event.srcElement || event.target;

    if (event.keyCode == 13)  //响应回车事件
    {
        //搜索
        if (e.name == "searchword1")
            document.getElementById("imgbtn_search").click();

        //首页登录
        if (e.name == "ctl00$ContentPlaceHolder1$txtUserName" || e.name == "ctl00$ContentPlaceHolder1$txtPassword")
            document.getElementById("ctl00_ContentPlaceHolder1_imgbtn_login").click();

        //找回密码
        if (e.name == "ctl00$ContentPlaceHolder1$txtgetpwdbyusername")
            document.getElementById("ctl00_ContentPlaceHolder1_imgbtn_getpwd").click();

        //登录页面登录
        if (e.name == "ctl00$ContentPlaceHolder1$txtusername" || e.name == "ctl00$ContentPlaceHolder1$txtpassword" || e.name == "ctl00$ContentPlaceHolder1$CheckCode")
            document.getElementById("ctl00_ContentPlaceHolder1_btnlogin").click();

        //注册页面注册
        if (e.name == "ctl00$ContentPlaceHolder1$txt_UserName" || e.name == "ctl00$ContentPlaceHolder1$txt_PWD" || e.name == "txt_PWDValidate" || e.name == "ctl00$ContentPlaceHolder1$txt_Email")
            document.getElementById("ctl00_ContentPlaceHolder1_btnRegister").click();

        event.keyCode = 0
        return false;
    }
}