js 实现时间

function getTime(){var date = new Date();var y = date.getFullYear();var m = date.getMonth()+1;var d = date.getDate();var h = date.getHours();var i = date.getMinutes();var s = date.getSeconds();$("#sysTime").html(y+"年"+(m>9?m:("0"+m))+"月"+(d>9?d:("0"+d))+"日 "+(h>9?h:("0"+h))+":"+(i>9?i:("0"+i))+":"+(s>9?s:("0"+s)));}$(function() {getTime();window.setInterval(getTime, 1000);}）

调用

<span id="sysTime"></span>