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原生js动态输出时间，笔记
function _time(){
var _date = new Date();
var _year = _date.getFullYear();
var _month = _date.getMonth() + 1;
if(_month < 10){
_month = "0" + _month;
}
var _ddate = _date.getDate();
if(_ddate < 10){
_ddate = "0" + _ddate;
}
var _hour = _date.getHours();
if(_hour < 10){
_hour = "0" + _hour;
}
var _minute = _date.getMinutes();
if(_minute < 10){
_minute = "0" + _minute;
}
var _second = _date.getSeconds();
if(_second < 10){
_second = "0" + _second;
}
_show.innerHTML = "服务器标准时间：" + _year + "-" + _month + "-" + _ddate + " " + _hour + ":" + _minute + ":" + _second;
}
var _show = document.getElementById("show_msg");
_time();
setInterval('_time()',1000);完