运行效果：
javascript文件：
function Clock() {
var date = new Date();
this.year = date.getFullYear();
this.month = date.getMonth() + 1;
this.date = date.getDate();
this.day = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六")[date.getDay()];
this.hour = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();
this.minute = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();
this.second = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();
// 计算日期为当年的第几周
function weekOfYear(year, month, day){
// year年 month月 day日
// 每周从周日开始
var date1 = new Date(year, 0, 1);
var date2 = new Date(year, month-1, day, 1);
var dayMS = 24*60*60*1000;
var firstDay = (7-date1.getDay())*dayMS;
var weekMS = 7*dayMS;
date1 = date1.getTime();
date2 = date2.getTime();
return Math.ceil((date2-date1-firstDay)/weekMS)+1;
}
this.toString = function() {
return "现在是:" + this.year + "年" + this.month + "月" + this.date + "日 " + this.hour + ":" + this.minute + ":" + this.second + " " + this.day
+" 今年第"+weekOfYear(this.year,this.month,this.date)+"周";
};
this.toSimpleDate = function() {
return this.year + "-" + this.month + "-" + this.date;
};
this.toDetailDate = function() {
return this.year + "-" + this.month + "-" + this.date + " " + this.hour + ":" + this.minute + ":" + this.second;
};
this.display = function(ele) {
var clock = new Clock();
ele.innerHTML = clock.toString();
window.setTimeout(function() {clock.display(ele);}, 1000);
};
}
html文件:
<html>
<head>
<title>clock</title>
<script src="Clock.js" type="text/javascript"></script>
</head>
<body>
<span id="clock"></span>
<script type="text/javascript">
var clock = new Clock();
clock.display(document.getElementById("clock"));
</script>
</body>
</html>
