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JavaScript显示时间并更新

2016-06-08 23:47 363 查看 
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>时间</title>
</head>
<body>
<div id="timer"></div>
</body>
<script type="text/javascript" src="time2.js"></script>
</html>
JavaScript文件
function updateTimer() {var date = new Date();var year = date.getFullYear();var month = date.getMonth() + 1;month = appendZero(month);var day = date.getDate();day = appendZero(day);var hour = date.getHours();hour = appendZero(hour);var minute = date.getMinutes();minute = appendZero(minute);var timer = document.getElementById("timer");timer.innerText = year + "-" + month + "-" + day + " " + hour + ":" + minute;setTimeout("updateTimer()", 500);}function appendZero(num) {if(num < 10) {num = "0" + num;}return num;}window.onload = function () {updateTimer();}

                                            

                                        

                        
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