<script type="text/javascript">
window.onload = function() {
var show = document.getElementById("show");
setInterval(function() {
var time = new Date(); // 程序计时的月从0开始取值后+1
var m = time.getMonth() + 1;
var t = time.getFullYear() + "-" + m + "-"

time.getDate() + " " + time.getHours() + ":"
time.getMinutes() + ":" + time.getSeconds();
show.innerHTML = t;
},1000);
};