javascript显示倒计时控制按钮的简单实现

/*发送邮件*/
function sendEmail(){//发送邮箱认证邮件
  var me = $("#sendAgain");
  me.time = 60;
  (function() {
    if (me.time > 1) {
      me.time--;
      me.html("2.再次发送还需(" + me.time + ")");
      setTimeout(arguments.callee, 1000);
      me.attr("onclick","");
    } else {
      me.html("2.再次发送激活邮件");
      me.attr("onclick","sendEmail()");
    }
  })();

}