js实现小时钟,js中Date对象的使用?

介绍一下js中Date对象的使用

dateObj = new Date()

dateObj = new Date(dateValue)

dateObj = new Date(year,month,date[,hours[,minutes[,seconds[,ms]]]]);

下面有一个小例子

<script type="text/javascript">
function setTime(){
//获得现在的时间
var now = new Date();
var year = now.getFullYear();
var month = now.getMonth();
month ++;
var date = now.getDate();
var day = now.getDay();
var hours = now.getHours();
var minute = now.getMinutes();
var second = now.getSeconds();
var arr_week = new Array("星期一","星期二","星期三","星期四","星期五","星期六","星期日");
var week = arr_week[day];
var time = year + "年" + month + "月" + date + "日 " + week + " " + hours + ":" +minute + ":" + second;
var clock = document.getElementById("clock");
clock.innerHTML ="当前时间: "+time;
}
//下载完成后,每隔一秒更新一次时间
window.onload = function(){
window.setInterval("setTime()", 1000);
}
</script>

显示效果: