<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>获取时间</title>
<script type="text/javascript">
function shijian() {
var today = new Date();
var hh = today.getHours();
var mm = today.getMinutes();
var ss = today.getSeconds();
var day = today.getDay();
var date = today.getDate();
var year = today.getFullYear();
var month = today.getMonth() + 1;
/*声明一个变量来接收转换成字符串*/
var dayday;
/*用switch完成转换操作*/
switch (day) {
case 1:
dayday = "一";
break;
case 2:
dayday = "二";
break;
case 3:
dayday = "三";
break;
case 4:
dayday = "四";
break;
case 5:
dayday = "五";
break;
case 6:
dayday = "六";
break;
case 7:
dayday = "日";
break;
}
/*声明AM和PM分别代表上午和下午，因为时间设置为12小时制，从用户角度出发，提供便利*/
var apm = "PM";
var abm = "AM";
/*从系统获取的时间为24小时制，我们减去12就可以转换成12小时制*/
if (hh > 12) {
var num = hh - 12;
document.getElementById("abc").innerHTML = "现在的系统时间:" + "<br/><br/>" + year + "年" + month + "月" + date + "日"
+ num + "时" + mm + "分" + ss + "秒" + " " + "星期" + dayday + " " + " " + apm + "<br/><br/>" + "下午好！欢迎来到TB128！";
} else {
document.getElementById("abc").innerHTML = "现在的系统时间:" + "<br/><br/>" + year + "年" + month + "月" + date + "日"
+ hh + "时" + mm + "分" + ss + "秒" + " " + "星期" + dayday + " " + " " + abm + "<br/><br/>" + "下午好！欢迎来到TB128！";
}
}
/*每1000毫秒(1秒)执行一次shijian()方法*/
setInterval("shijian()", 1000)
</script>
</head>
<body>
<div id="abc">
<input type="button" value="查看系统时间" onclick="shijian()">
</div>
</body>
</html>
