认识达内从这里开始

首先在页面中我们直接写一个标签，然后给标签定义一个id，这里我们用什么标签都可以，我们就用<span></span>演示吧，

代码如下：

<span id="clock" ></span>

<script type="text/javascript">

var clock = new Clock();

clock.display(document.getElementById("clock"));

</script>

上面我们实例化了一个Clock的对象，这里我们就在外部定义一个Clock的类，

获取当前时间并进行时间的格式化，代码如下：

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();

this.toString = function() {

return "现在是:" + this.year + "年" + this.month + "月" + this.date + "日" + this.hour + ":" + this.minute + ":" + this.second + " " + this.day;

};

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);

};

}

之后我们在页面头部中引入该js就好了：

<script src="js/Clock.js" type=text/javascript></script>

了解详情请登陆昆明达内IT培训官网（km.tedu.cn）！